Algebra Examples

$\tan (810 °)$

Step 1

Rewrite $\tan (810 °)$ in terms of sines and cosines.

$\frac{\sin (810 °)}{\cos (810 °)}$

Step 2

Remove full rotations of $360$ ° until the angle is between $0$ ° and $360$ °.

$\frac{\sin (810 °)}{\cos (90)}$

Step 3

The exact value of $\cos (90)$ is $0$ .

$\frac{\sin (810 °)}{0}$

Step 4

The expression contains a division by $0$ . The expression is undefined.

Undefined