Trigonometry Examples

$\sqrt{\frac{1 + \frac{2}{9}}{2}}$

Step 1

Write $1$ as a fraction with a common denominator.

$\sqrt{\frac{\frac{9}{9} + \frac{2}{9}}{2}}$

Step 2

Combine the numerators over the common denominator.

$\sqrt{\frac{\frac{9 + 2}{9}}{2}}$

Step 3

Add $9$ and $2$ .

$\sqrt{\frac{\frac{11}{9}}{2}}$

Step 4

Multiply the numerator by the reciprocal of the denominator.

$\sqrt{\frac{11}{9} \cdot \frac{1}{2}}$

Step 5

Multiply $\frac{11}{9} \cdot \frac{1}{2}$ .

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Step 5.1

Multiply $\frac{11}{9}$ by $\frac{1}{2}$ .

$\sqrt{\frac{11}{9 \cdot 2}}$

Step 5.2

Multiply $9$ by $2$ .

$\sqrt{\frac{11}{18}}$

Step 6

Rewrite $\sqrt{\frac{11}{18}}$ as $\frac{\sqrt{11}}{\sqrt{18}}$ .

$\frac{\sqrt{11}}{\sqrt{18}}$

Step 7

Simplify the denominator.

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Step 7.1

Rewrite $18$ as $3^{2} \cdot 2$ .

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Step 7.1.1

Factor $9$ out of $18$ .

$\frac{\sqrt{11}}{\sqrt{9 (2)}}$

Step 7.1.2

Rewrite $9$ as $3^{2}$ .

$\frac{\sqrt{11}}{\sqrt{3^{2} \cdot 2}}$

Step 7.2

Pull terms out from under the radical.

$\frac{\sqrt{11}}{3 \sqrt{2}}$

Step 8

Multiply $\frac{\sqrt{11}}{3 \sqrt{2}}$ by $\frac{\sqrt{2}}{\sqrt{2}}$ .

$\frac{\sqrt{11}}{3 \sqrt{2}} \cdot \frac{\sqrt{2}}{\sqrt{2}}$

Step 9

Combine and simplify the denominator.

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Step 9.1

Multiply $\frac{\sqrt{11}}{3 \sqrt{2}}$ by $\frac{\sqrt{2}}{\sqrt{2}}$ .

$\frac{\sqrt{11} \sqrt{2}}{3 \sqrt{2} \sqrt{2}}$

Step 9.2

Move $\sqrt{2}$ .

$\frac{\sqrt{11} \sqrt{2}}{3 (\sqrt{2} \sqrt{2})}$

Step 9.3

Raise $\sqrt{2}$ to the power of $1$ .

$\frac{\sqrt{11} \sqrt{2}}{3 ({\sqrt{2}}^{1} \sqrt{2})}$

Step 9.4

Raise $\sqrt{2}$ to the power of $1$ .

$\frac{\sqrt{11} \sqrt{2}}{3 ({\sqrt{2}}^{1} {\sqrt{2}}^{1})}$

Step 9.5

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{\sqrt{11} \sqrt{2}}{3 {\sqrt{2}}^{1 + 1}}$

Step 9.6

Add $1$ and $1$ .

$\frac{\sqrt{11} \sqrt{2}}{3 {\sqrt{2}}^{2}}$

Step 9.7

Rewrite ${\sqrt{2}}^{2}$ as $2$ .

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Step 9.7.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2}$ as $2^{\frac{1}{2}}$ .

$\frac{\sqrt{11} \sqrt{2}}{3 {(2^{\frac{1}{2}})}^{2}}$

Step 9.7.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{\sqrt{11} \sqrt{2}}{3 \cdot 2^{\frac{1}{2} \cdot 2}}$

Step 9.7.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{\sqrt{11} \sqrt{2}}{3 \cdot 2^{\frac{2}{2}}}$

Step 9.7.4

Cancel the common factor of $2$ .

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Step 9.7.4.1

Cancel the common factor.

$\frac{\sqrt{11} \sqrt{2}}{3 \cdot 2^{\frac{2}{2}}}$

Step 9.7.4.2

Rewrite the expression.

$\frac{\sqrt{11} \sqrt{2}}{3 \cdot 2^{1}}$

Step 9.7.5

Evaluate the exponent.

$\frac{\sqrt{11} \sqrt{2}}{3 \cdot 2}$

Step 10

Simplify the numerator.

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Step 10.1

Combine using the product rule for radicals.

$\frac{\sqrt{11 \cdot 2}}{3 \cdot 2}$

Step 10.2

Multiply $11$ by $2$ .

$\frac{\sqrt{22}}{3 \cdot 2}$

Step 11

Multiply $3$ by $2$ .

$\frac{\sqrt{22}}{6}$

Step 12

The result can be shown in multiple forms.

Exact Form:

$\frac{\sqrt{22}}{6}$

Decimal Form:

$0.78173595 \dots$