Trigonometry Examples

$\csc^{2} (x) \tan^{2} (x) - 1$

Step 1

Simplify each term.

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Step 1.1

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

${(\frac{1}{\sin (x)})}^{2} \tan^{2} (x) - 1$

Step 1.2

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

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

Step 1.3

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

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

Step 1.4

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

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

Step 1.5

One to any power is one.

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

Step 1.6

Multiply $\frac{1}{\sin^{2} (x)}$ by $\frac{\sin^{2} (x)}{\cos^{2} (x)}$ .

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

Step 1.7

Cancel the common factor of $\sin^{2} (x)$ .

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Step 1.7.1

Cancel the common factor.

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

Step 1.7.2

Rewrite the expression.

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

Step 1.8

Rewrite $1$ as $1^{2}$ .

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

Step 1.9

Rewrite $\frac{1^{2}}{\cos^{2} (x)}$ as ${(\frac{1}{\cos (x)})}^{2}$ .

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

Step 1.10

Convert from $\frac{1}{\cos (x)}$ to $\sec (x)$ .

$\sec^{2} (x) - 1$

Step 2

Apply pythagorean identity.

$\tan^{2} (x)$