Trigonometry Examples

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

Step 1

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

Opposite : $\sqrt{3}$

Adjacent : $- 1$

Step 2

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

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

Step 3

Simplify $\cot (θ)$ .

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Step 3.1

Move the negative in front of the fraction.

$\cot (θ) = - \frac{1}{\sqrt{3}}$

Step 3.2

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

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

Step 3.3

Combine and simplify the denominator.

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Step 3.3.1

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

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

Step 3.3.2

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

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

Step 3.3.3

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

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

Step 3.3.4

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

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

Step 3.3.5

Add $1$ and $1$ .

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

Step 3.3.6

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

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Step 3.3.6.1

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 3.3.6.2

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 3.3.6.3

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

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

Step 3.3.6.4

Cancel the common factor of $2$ .

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Step 3.3.6.4.1

Cancel the common factor.

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

Step 3.3.6.4.2

Rewrite the expression.

$\cot (θ) = - \frac{\sqrt{3}}{3}$

Step 3.3.6.5

Evaluate the exponent.

$\cot (θ) = - \frac{\sqrt{3}}{3}$

Step 4

Approximate the result.

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