Trigonometry Examples

$\cos^{2} (x) + \cos^{2} (x) \cot^{2} (x)$

Step 1

Multiply by $1$ .

$\cos^{2} (x) \cdot 1 + \cos^{2} (x) \cot^{2} (x)$

Step 2

Simplify with factoring out.

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Step 2.1

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

$\cos^{2} (x) \cdot 1 + \cos^{2} (x) (\cot^{2} (x))$

Step 2.2

Factor $\cos^{2} (x)$ out of $\cos^{2} (x) \cdot 1 + \cos^{2} (x) (\cot^{2} (x))$ .

$\cos^{2} (x) \cdot (1 + \cot^{2} (x))$

Step 3

Apply pythagorean identity.

$\cos^{2} (x) \cdot \csc^{2} (x)$

Step 4

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

$\cos^{2} (x) \cdot {(\frac{1}{\sin (x)})}^{2}$

Step 5

Simplify the expression.

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Step 5.1

Apply the product rule to $\frac{1}{\sin (x)}$ .

$\cos^{2} (x) \cdot \frac{1^{2}}{\sin^{2} (x)}$

Step 5.2

One to any power is one.

$\cos^{2} (x) \cdot \frac{1}{\sin^{2} (x)}$

Step 6

Combine $\cos^{2} (x)$ and $\frac{1}{\sin^{2} (x)}$ .

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

Step 7

Convert from $\frac{\cos^{2} (x)}{\sin^{2} (x)}$ to $\cot^{2} (x)$ .

$\cot^{2} (x)$