Trigonometry Examples

$(- \frac{1}{2}, - \frac{\sqrt{3}}{2})$

Step 1

To find the $\cot (θ)$ between the x-axis and the line between the points $(0, 0)$ and $(- \frac{1}{2}, - \frac{\sqrt{3}}{2})$ , draw the triangle between the three points $(0, 0)$ , $(- \frac{1}{2}, 0)$ , and $(- \frac{1}{2}, - \frac{\sqrt{3}}{2})$ .

Opposite : $- \frac{\sqrt{3}}{2}$

Adjacent : $- \frac{1}{2}$

Step 2

$\cot (θ) = \frac{Adjacent}{Opposite}$ therefore $\cot (θ) = \frac{- \frac{1}{2}}{- \frac{\sqrt{3}}{2}}$ .

$\frac{- \frac{1}{2}}{- \frac{\sqrt{3}}{2}}$

Step 3

Simplify $\cot (θ)$ .

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Step 3.1

Dividing two negative values results in a positive value.

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

Step 3.2

Multiply the numerator by the reciprocal of the denominator.

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

Step 3.3

Cancel the common factor of $2$ .

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Step 3.3.1

Cancel the common factor.

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

Step 3.3.2

Rewrite the expression.

$\cot (θ) = \frac{1}{\sqrt{3}}$

Step 3.4

Multiply $\frac{1}{\sqrt{3}}$ by $\frac{\sqrt{3}}{\sqrt{3}}$ .

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

Step 3.5

Combine and simplify the denominator.

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Step 3.5.1

Multiply $\frac{1}{\sqrt{3}}$ by $\frac{\sqrt{3}}{\sqrt{3}}$ .

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

Step 3.5.2

Raise $\sqrt{3}$ to the power of $1$ .

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

Step 3.5.3

Raise $\sqrt{3}$ to the power of $1$ .

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

Step 3.5.4

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

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

Step 3.5.5

Add $1$ and $1$ .

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

Step 3.5.6

Rewrite ${\sqrt{3}}^{2}$ as $3$ .

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Step 3.5.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{3}$ as $3^{\frac{1}{2}}$ .

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

Step 3.5.6.2

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

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

Step 3.5.6.3

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

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

Step 3.5.6.4

Cancel the common factor of $2$ .

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Step 3.5.6.4.1

Cancel the common factor.

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

Step 3.5.6.4.2

Rewrite the expression.

$\cot (θ) = \frac{\sqrt{3}}{3}$

Step 3.5.6.5

Evaluate the exponent.

$\cot (θ) = \frac{\sqrt{3}}{3}$

Step 4

Approximate the result.

$\cot (θ) = \frac{\sqrt{3}}{3} \approx 0.57735026$