Trigonometry Examples

sin (θ) = \frac{\sqrt{7}}{4}

$\sin (θ) = \frac{\sqrt{7}}{4}$ ,

cos (θ) = \frac{3}{4}

$\cos (θ) = \frac{3}{4}$

Step 1

To find the value of

tan (θ)

$\tan (θ)$ , use the fact that

tan (θ) = \frac{sin (θ)}{cos (θ)}

$\tan (θ) = \frac{\sin (θ)}{\cos (θ)}$ then substitute in the known values.

tan (θ) = \frac{sin (θ)}{cos (θ)} = \frac{\frac{\sqrt{7}}{4}}{\frac{3}{4}}

$\tan (θ) = \frac{\sin (θ)}{\cos (θ)} = \frac{\frac{\sqrt{7}}{4}}{\frac{3}{4}}$

Step 2

Simplify the result.

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Step 2.1

Multiply the numerator by the reciprocal of the denominator.

tan (θ) = \frac{sin (θ)}{cos (θ)} = \frac{\sqrt{7}}{4} \cdot \frac{4}{3}

$\tan (θ) = \frac{\sin (θ)}{\cos (θ)} = \frac{\sqrt{7}}{4} \cdot \frac{4}{3}$

Step 2.2

Cancel the common factor of

4

$4$ .

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Step 2.2.1

Cancel the common factor.

$\tan (θ) = \frac{\sin (θ)}{\cos (θ)} = \frac{\sqrt{7}}{4} \cdot \frac{4}{3}$

Step 2.2.2

Rewrite the expression.

$\tan (θ) = \frac{\sin (θ)}{\cos (θ)} = \sqrt{7} (\frac{1}{3})$

Step 2.3

Combine

$\sqrt{7}$ and

$\frac{1}{3}$ .

$\tan (θ) = \frac{\sin (θ)}{\cos (θ)} = \frac{\sqrt{7}}{3}$

Step 3

To find the value of

$\cot (θ)$ , use the fact that

$\frac{1}{\tan (θ)}$ then substitute in the known values.

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{1}{\frac{\sqrt{7}}{3}}$

Step 4

Simplify the result.

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Step 4.1

Multiply the numerator by the reciprocal of the denominator.

$\cot (θ) = \frac{1}{\tan (θ)} = 1 (\frac{3}{\sqrt{7}})$

Step 4.2

Multiply

$\frac{3}{\sqrt{7}}$ by

$1$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3}{\sqrt{7}}$

Step 4.3

Multiply

$\frac{3}{\sqrt{7}}$ by

$\frac{\sqrt{7}}{\sqrt{7}}$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3}{\sqrt{7}} \cdot \frac{\sqrt{7}}{\sqrt{7}}$

Step 4.4

Combine and simplify the denominator.

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Step 4.4.1

Multiply

$\frac{3}{\sqrt{7}}$ by

$\frac{\sqrt{7}}{\sqrt{7}}$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{\sqrt{7} \sqrt{7}}$

Step 4.4.2

Raise

$\sqrt{7}$ to the power of

$1$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{\sqrt{7} \sqrt{7}}$

Step 4.4.3

Raise

$\sqrt{7}$ to the power of

$1$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{\sqrt{7} \sqrt{7}}$

Step 4.4.4

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{{\sqrt{7}}^{1 + 1}}$

Step 4.4.5

Add

$1$ and

$1$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{{\sqrt{7}}^{2}}$

Step 4.4.6

Rewrite

${\sqrt{7}}^{2}$ as

$7$ .

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Step 4.4.6.1

Use

$\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite

$\sqrt{7}$ as

$7^{\frac{1}{2}}$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{{(7^{\frac{1}{2}})}^{2}}$

Step 4.4.6.2

Apply the power rule and multiply exponents,

${(a^{m})}^{n} = a^{m n}$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{7^{\frac{1}{2} \cdot 2}}$

Step 4.4.6.3

Combine

$\frac{1}{2}$ and

$2$ .

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{7^{\frac{2}{2}}}$

Step 4.4.6.4

Cancel the common factor of

$2$ .

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Step 4.4.6.4.1

Cancel the common factor.

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{7^{\frac{2}{2}}}$

Step 4.4.6.4.2

Rewrite the expression.

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{7}$

Step 4.4.6.5

Evaluate the exponent.

$\cot (θ) = \frac{1}{\tan (θ)} = \frac{3 \sqrt{7}}{7}$

Step 5

To find the value of

$\sec (θ)$ , use the fact that

$\frac{1}{\cos (θ)}$ then substitute in the known values.

$\sec (θ) = \frac{1}{\cos (θ)} = \frac{1}{\frac{3}{4}}$

Step 6

Simplify the result.

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Step 6.1

Multiply the numerator by the reciprocal of the denominator.

$\sec (θ) = \frac{1}{\cos (θ)} = 1 (\frac{4}{3})$

Step 6.2

Multiply

$\frac{4}{3}$ by

$1$ .

$\sec (θ) = \frac{1}{\cos (θ)} = \frac{4}{3}$

Step 7

To find the value of

$\csc (θ)$ , use the fact that

$\frac{1}{\sin (θ)}$ then substitute in the known values.

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{1}{\frac{\sqrt{7}}{4}}$

Step 8

Simplify the result.

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Step 8.1

Multiply the numerator by the reciprocal of the denominator.

$\csc (θ) = \frac{1}{\sin (θ)} = 1 (\frac{4}{\sqrt{7}})$

Step 8.2

Multiply

$\frac{4}{\sqrt{7}}$ by

$1$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4}{\sqrt{7}}$

Step 8.3

Multiply

$\frac{4}{\sqrt{7}}$ by

$\frac{\sqrt{7}}{\sqrt{7}}$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4}{\sqrt{7}} \cdot \frac{\sqrt{7}}{\sqrt{7}}$

Step 8.4

Combine and simplify the denominator.

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Step 8.4.1

Multiply

$\frac{4}{\sqrt{7}}$ by

$\frac{\sqrt{7}}{\sqrt{7}}$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{\sqrt{7} \sqrt{7}}$

Step 8.4.2

Raise

$\sqrt{7}$ to the power of

$1$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{\sqrt{7} \sqrt{7}}$

Step 8.4.3

Raise

$\sqrt{7}$ to the power of

$1$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{\sqrt{7} \sqrt{7}}$

Step 8.4.4

Use the power rule

$a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{{\sqrt{7}}^{1 + 1}}$

Step 8.4.5

Add

$1$ and

$1$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{{\sqrt{7}}^{2}}$

Step 8.4.6

Rewrite

${\sqrt{7}}^{2}$ as

$7$ .

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Step 8.4.6.1

Use

$\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite

$\sqrt{7}$ as

$7^{\frac{1}{2}}$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{{(7^{\frac{1}{2}})}^{2}}$

Step 8.4.6.2

Apply the power rule and multiply exponents,

${(a^{m})}^{n} = a^{m n}$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{7^{\frac{1}{2} \cdot 2}}$

Step 8.4.6.3

Combine

$\frac{1}{2}$ and

$2$ .

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{7^{\frac{2}{2}}}$

Step 8.4.6.4

Cancel the common factor of

$2$ .

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Step 8.4.6.4.1

Cancel the common factor.

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{7^{\frac{2}{2}}}$

Step 8.4.6.4.2

Rewrite the expression.

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{7}$

Step 8.4.6.5

Evaluate the exponent.

$\csc (θ) = \frac{1}{\sin (θ)} = \frac{4 \sqrt{7}}{7}$

Step 9

The trig functions found are as follows:

$\sin (θ) = \frac{\sqrt{7}}{4}$

$\cos (θ) = \frac{3}{4}$

$\tan (θ) = \frac{\sqrt{7}}{3}$

$\cot (θ) = \frac{3 \sqrt{7}}{7}$

$\sec (θ) = \frac{4}{3}$

$\csc (θ) = \frac{4 \sqrt{7}}{7}$