Trigonometry Examples

$\tan^{2} (x) + 1 = \sec^{2} (x)$

Step 1

Start on the left side.

$\tan^{2} (x) + 1$

Step 2

Apply pythagorean identity.

$\sec^{2} (x)$

Step 3

Because the two sides have been shown to be equivalent, the equation is an identity.

$\tan^{2} (x) + 1 = \sec^{2} (x)$ is an identity