حساب المثلثات الأمثلة

${(\frac{1}{4} \cdot (\cos (\frac{π}{10}) + i \sin (\frac{π}{10})))}^{5}$

خطوة 1

طبّق خاصية التوزيع.

${(\frac{1}{4} \cos (\frac{π}{10}) + \frac{1}{4} (i \sin (\frac{π}{10})))}^{5}$

خطوة 2

اجمع $\frac{1}{4}$ و $\cos (\frac{π}{10})$ .

${(\frac{\cos (\frac{π}{10})}{4} + \frac{1}{4} (i \sin (\frac{π}{10})))}^{5}$

خطوة 3

اضرب $\frac{1}{4} (i \sin (\frac{π}{10}))$ .

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خطوة 3.1

اجمع $i$ و $\frac{1}{4}$ .

${(\frac{\cos (\frac{π}{10})}{4} + \frac{i}{4} \sin (\frac{π}{10}))}^{5}$

خطوة 3.2

اجمع $\frac{i}{4}$ و $\sin (\frac{π}{10})$ .

${(\frac{\cos (\frac{π}{10})}{4} + \frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 4

استخدِم مبرهنة ذات الحدين.

${(\frac{\cos (\frac{π}{10})}{4})}^{5} + 5 {(\frac{\cos (\frac{π}{10})}{4})}^{4} \frac{i \sin (\frac{π}{10})}{4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5

بسّط الحدود.

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خطوة 5.1

بسّط كل حد.

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خطوة 5.1.1

طبّق قاعدة الضرب على $\frac{\cos (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{4^{5}} + 5 {(\frac{\cos (\frac{π}{10})}{4})}^{4} \frac{i \sin (\frac{π}{10})}{4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.2

ارفع $4$ إلى القوة $5$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + 5 {(\frac{\cos (\frac{π}{10})}{4})}^{4} \frac{i \sin (\frac{π}{10})}{4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.3

طبّق قاعدة الضرب على $\frac{\cos (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + 5 \frac{\cos^{4} (\frac{π}{10})}{4^{4}} \frac{i \sin (\frac{π}{10})}{4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.4

ارفع $4$ إلى القوة $4$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + 5 \frac{\cos^{4} (\frac{π}{10})}{256} \frac{i \sin (\frac{π}{10})}{4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.5

اجمع $5$ و $\frac{\cos^{4} (\frac{π}{10})}{256}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10})}{256} \cdot \frac{i \sin (\frac{π}{10})}{4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.6

اجمع.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) (i \sin (\frac{π}{10}))}{256 \cdot 4} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.7

اضرب $256$ في $4$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{3} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.8

طبّق قاعدة الضرب على $\frac{\cos (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + 10 \frac{\cos^{3} (\frac{π}{10})}{4^{3}} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.9

ارفع $4$ إلى القوة $3$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + 10 \frac{\cos^{3} (\frac{π}{10})}{64} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.10

ألغِ العامل المشترك لـ $2$ .

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خطوة 5.1.10.1

أخرِج العامل $2$ من $10$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + 2 (5) \frac{\cos^{3} (\frac{π}{10})}{64} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.10.2

أخرِج العامل $2$ من $64$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + 2 \cdot 5 \frac{\cos^{3} (\frac{π}{10})}{2 \cdot 32} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.10.3

ألغِ العامل المشترك.

خطوة 5.1.10.4

أعِد كتابة العبارة.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + 5 \frac{\cos^{3} (\frac{π}{10})}{32} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.11

اجمع $5$ و $\frac{\cos^{3} (\frac{π}{10})}{32}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{5 \cos^{3} (\frac{π}{10})}{32} {(\frac{i \sin (\frac{π}{10})}{4})}^{2} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.12

استخدِم قاعدة القوة ${(a b)}^{n} = a^{n} b^{n}$ لتوزيع الأُس.

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خطوة 5.1.12.1

طبّق قاعدة الضرب على $\frac{i \sin (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{5 \cos^{3} (\frac{π}{10})}{32} \cdot \frac{{(i \sin (\frac{π}{10}))}^{2}}{4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.12.2

طبّق قاعدة الضرب على $i \sin (\frac{π}{10})$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{5 \cos^{3} (\frac{π}{10})}{32} \cdot \frac{i^{2} \sin^{2} (\frac{π}{10})}{4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.13

اجمع.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{5 \cos^{3} (\frac{π}{10}) (i^{2} \sin^{2} (\frac{π}{10}))}{32 \cdot 4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.14

بسّط بَسْط الكسر.

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خطوة 5.1.14.1

أعِد كتابة $i^{2}$ بالصيغة $- 1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{5 \cos^{3} (\frac{π}{10}) \cdot - 1 \sin^{2} (\frac{π}{10})}{32 \cdot 4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.14.2

اجمع الأُسس.

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خطوة 5.1.14.2.1

أخرِج السالب.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- (5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10}))}{32 \cdot 4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.14.2.2

اضرب $5$ في $- 1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 (\cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10}))}{32 \cdot 4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{32 \cdot 4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.15

بسّط القاسم.

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خطوة 5.1.15.1

أعِد كتابة $32$ بالصيغة $2^{5}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{2^{5} \cdot 4^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.15.2

أعِد كتابة $4$ بالصيغة $2^{2}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{2^{5} \cdot {(2^{2})}^{2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.15.3

اضرب الأُسس في ${(2^{2})}^{2}$ .

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خطوة 5.1.15.3.1

طبّق قاعدة القوة واضرب الأُسس، ${(a^{m})}^{n} = a^{m n}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{2^{5} \cdot 2^{2 \cdot 2}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.15.3.2

اضرب $2$ في $2$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{2^{5} \cdot 2^{4}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.15.4

استخدِم قاعدة القوة $a^{m} a^{n} = a^{m + n}$ لتجميع الأُسس.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{2^{5 + 4}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.15.5

أضف $5$ و $4$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{2^{9}} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.16

ارفع $2$ إلى القوة $9$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} + \frac{- 5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.17

انقُل السالب أمام الكسر.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 10 {(\frac{\cos (\frac{π}{10})}{4})}^{2} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.18

طبّق قاعدة الضرب على $\frac{\cos (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 10 \frac{\cos^{2} (\frac{π}{10})}{4^{2}} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.19

ارفع $4$ إلى القوة $2$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 10 \frac{\cos^{2} (\frac{π}{10})}{16} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.20

ألغِ العامل المشترك لـ $2$ .

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خطوة 5.1.20.1

أخرِج العامل $2$ من $10$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 2 (5) \frac{\cos^{2} (\frac{π}{10})}{16} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.20.2

أخرِج العامل $2$ من $16$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 2 \cdot 5 \frac{\cos^{2} (\frac{π}{10})}{2 \cdot 8} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.20.3

ألغِ العامل المشترك.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 2 \cdot 5 \frac{\cos^{2} (\frac{π}{10})}{2 \cdot 8} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.20.4

أعِد كتابة العبارة.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + 5 \frac{\cos^{2} (\frac{π}{10})}{8} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.21

اجمع $5$ و $\frac{\cos^{2} (\frac{π}{10})}{8}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10})}{8} {(\frac{i \sin (\frac{π}{10})}{4})}^{3} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.22

استخدِم قاعدة القوة ${(a b)}^{n} = a^{n} b^{n}$ لتوزيع الأُس.

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خطوة 5.1.22.1

طبّق قاعدة الضرب على $\frac{i \sin (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10})}{8} \cdot \frac{{(i \sin (\frac{π}{10}))}^{3}}{4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.22.2

طبّق قاعدة الضرب على $i \sin (\frac{π}{10})$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10})}{8} \cdot \frac{i^{3} \sin^{3} (\frac{π}{10})}{4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.23

اجمع.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10}) (i^{3} \sin^{3} (\frac{π}{10}))}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.24

بسّط بَسْط الكسر.

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خطوة 5.1.24.1

أخرِج عامل $i^{2}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10}) (i^{2} \cdot i) \sin^{3} (\frac{π}{10})}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.24.2

أعِد كتابة $i^{2}$ بالصيغة $- 1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10}) (- 1 \cdot i) \sin^{3} (\frac{π}{10})}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.24.3

أعِد كتابة $- 1 i$ بالصيغة $- i$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{5 \cos^{2} (\frac{π}{10}) \cdot - 1 i \sin^{3} (\frac{π}{10})}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.24.4

اجمع الأُسس.

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خطوة 5.1.24.4.1

أخرِج السالب.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- (5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10}))}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.24.4.2

اضرب $5$ في $- 1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 (\cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10}))}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{8 \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.25

بسّط القاسم.

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خطوة 5.1.25.1

أعِد كتابة $8$ بالصيغة $2^{3}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{2^{3} \cdot 4^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.25.2

أعِد كتابة $4$ بالصيغة $2^{2}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{2^{3} \cdot {(2^{2})}^{3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.25.3

اضرب الأُسس في ${(2^{2})}^{3}$ .

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خطوة 5.1.25.3.1

طبّق قاعدة القوة واضرب الأُسس، ${(a^{m})}^{n} = a^{m n}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{2^{3} \cdot 2^{2 \cdot 3}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.25.3.2

اضرب $2$ في $3$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{2^{3} \cdot 2^{6}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.25.4

استخدِم قاعدة القوة $a^{m} a^{n} = a^{m + n}$ لتجميع الأُسس.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{2^{3 + 6}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.25.5

أضف $3$ و $6$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{2^{9}} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.26

ارفع $2$ إلى القوة $9$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{- 5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.27

انقُل السالب أمام الكسر.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + 5 \frac{\cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.28

اجمع $5$ و $\frac{\cos (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10})}{4} {(\frac{i \sin (\frac{π}{10})}{4})}^{4} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.29

استخدِم قاعدة القوة ${(a b)}^{n} = a^{n} b^{n}$ لتوزيع الأُس.

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خطوة 5.1.29.1

طبّق قاعدة الضرب على $\frac{i \sin (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10})}{4} \cdot \frac{{(i \sin (\frac{π}{10}))}^{4}}{4^{4}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.29.2

طبّق قاعدة الضرب على $i \sin (\frac{π}{10})$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10})}{4} \cdot \frac{i^{4} \sin^{4} (\frac{π}{10})}{4^{4}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.30

اجمع.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) (i^{4} \sin^{4} (\frac{π}{10}))}{4 \cdot 4^{4}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.31

اضرب $4$ في $4^{4}$ بجمع الأُسس.

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خطوة 5.1.31.1

اضرب $4$ في $4^{4}$ .

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خطوة 5.1.31.1.1

ارفع $4$ إلى القوة $1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) (i^{4} \sin^{4} (\frac{π}{10}))}{4^{1} \cdot 4^{4}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.31.1.2

استخدِم قاعدة القوة $a^{m} a^{n} = a^{m + n}$ لتجميع الأُسس.

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) (i^{4} \sin^{4} (\frac{π}{10}))}{4^{1 + 4}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.31.2

أضف $1$ و $4$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) (i^{4} \sin^{4} (\frac{π}{10}))}{4^{5}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.32

بسّط بَسْط الكسر.

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خطوة 5.1.32.1

أعِد كتابة $i^{4}$ بالصيغة $1$ .

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خطوة 5.1.32.1.1

أعِد كتابة $i^{4}$ بالصيغة ${(i^{2})}^{2}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) {(i^{2})}^{2} \sin^{4} (\frac{π}{10})}{4^{5}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.32.1.2

أعِد كتابة $i^{2}$ بالصيغة $- 1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) {(- 1)}^{2} \sin^{4} (\frac{π}{10})}{4^{5}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.32.1.3

ارفع $- 1$ إلى القوة $2$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \cdot 1 \sin^{4} (\frac{π}{10})}{4^{5}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.32.2

اضرب $5$ في $1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{4^{5}} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.33

ارفع $4$ إلى القوة $5$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + {(\frac{i \sin (\frac{π}{10})}{4})}^{5}$

خطوة 5.1.34

استخدِم قاعدة القوة ${(a b)}^{n} = a^{n} b^{n}$ لتوزيع الأُس.

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خطوة 5.1.34.1

طبّق قاعدة الضرب على $\frac{i \sin (\frac{π}{10})}{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{{(i \sin (\frac{π}{10}))}^{5}}{4^{5}}$

خطوة 5.1.34.2

طبّق قاعدة الضرب على $i \sin (\frac{π}{10})$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i^{5} \sin^{5} (\frac{π}{10})}{4^{5}}$

خطوة 5.1.35

بسّط بَسْط الكسر.

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خطوة 5.1.35.1

أخرِج عامل $i^{4}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i^{4} i \sin^{5} (\frac{π}{10})}{4^{5}}$

خطوة 5.1.35.2

أعِد كتابة $i^{4}$ بالصيغة $1$ .

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خطوة 5.1.35.2.1

أعِد كتابة $i^{4}$ بالصيغة ${(i^{2})}^{2}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{{(i^{2})}^{2} i \sin^{5} (\frac{π}{10})}{4^{5}}$

خطوة 5.1.35.2.2

أعِد كتابة $i^{2}$ بالصيغة $- 1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{{(- 1)}^{2} i \sin^{5} (\frac{π}{10})}{4^{5}}$

خطوة 5.1.35.2.3

ارفع $- 1$ إلى القوة $2$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{1 i \sin^{5} (\frac{π}{10})}{4^{5}}$

خطوة 5.1.35.3

اضرب $i$ في $1$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i \sin^{5} (\frac{π}{10})}{4^{5}}$

خطوة 5.1.36

ارفع $4$ إلى القوة $5$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i \sin^{5} (\frac{π}{10})}{1024}$

خطوة 5.2

بسّط العبارة.

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خطوة 5.2.1

أعِد ترتيب العوامل في $\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 \cos^{4} (\frac{π}{10}) i \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 \cos^{2} (\frac{π}{10}) i \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i \sin^{5} (\frac{π}{10})}{1024}$ .

$\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 i \cos^{4} (\frac{π}{10}) \sin (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} - \frac{5 i \cos^{2} (\frac{π}{10}) \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i \sin^{5} (\frac{π}{10})}{1024}$

خطوة 5.2.2

أعِد ترتيب $\frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 i \cos^{4} (\frac{π}{10}) \sin (\frac{π}{10})}{1024}$ و $- \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512}$ .

$- \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 i \cos^{4} (\frac{π}{10}) \sin (\frac{π}{10})}{1024} - \frac{5 i \cos^{2} (\frac{π}{10}) \sin^{3} (\frac{π}{10})}{512} + \frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} + \frac{i \sin^{5} (\frac{π}{10})}{1024}$

خطوة 5.2.3

أعِد ترتيب $- \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 i \cos^{4} (\frac{π}{10}) \sin (\frac{π}{10})}{1024} - \frac{5 i \cos^{2} (\frac{π}{10}) \sin^{3} (\frac{π}{10})}{512}$ و $\frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024}$ .

$\frac{5 \cos (\frac{π}{10}) \sin^{4} (\frac{π}{10})}{1024} - \frac{5 \cos^{3} (\frac{π}{10}) \sin^{2} (\frac{π}{10})}{512} + \frac{\cos^{5} (\frac{π}{10})}{1024} + \frac{5 i \cos^{4} (\frac{π}{10}) \sin (\frac{π}{10})}{1024} - \frac{5 i \cos^{2} (\frac{π}{10}) \sin^{3} (\frac{π}{10})}{512} + \frac{i \sin^{5} (\frac{π}{10})}{1024}$