Trigonometry Examples

$\cos (x) \cdot \cot (x)$

Step 1

Rewrite $\cot (x)$ in terms of sines and cosines.

$\cos (x) \cdot \frac{\cos (x)}{\sin (x)}$

Step 2

Multiply $\cos (x) \frac{\cos (x)}{\sin (x)}$ .

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Step 2.1

Combine $\cos (x)$ and $\frac{\cos (x)}{\sin (x)}$ .

$\frac{\cos (x) \cos (x)}{\sin (x)}$

Step 2.2

Raise $\cos (x)$ to the power of $1$ .

$\frac{\cos^{1} (x) \cos (x)}{\sin (x)}$

Step 2.3

Raise $\cos (x)$ to the power of $1$ .

$\frac{\cos^{1} (x) \cos^{1} (x)}{\sin (x)}$

Step 2.4

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

$\frac{{\cos (x)}^{1 + 1}}{\sin (x)}$

Step 2.5

Add $1$ and $1$ .

$\frac{\cos^{2} (x)}{\sin (x)}$

Step 3

Factor $\cos (x)$ out of $\cos^{2} (x)$ .

$\frac{\cos (x) \cos (x)}{\sin (x)}$

Step 4

Separate fractions.

$\frac{\cos (x)}{1} \cdot \frac{\cos (x)}{\sin (x)}$

Step 5

Convert from $\frac{\cos (x)}{\sin (x)}$ to $\cot (x)$ .

$\frac{\cos (x)}{1} \cot (x)$

Step 6

Divide $\cos (x)$ by $1$ .

$\cos (x) \cot (x)$