Trigonometry Examples

$\cot (- 180)$

Step 1

Rewrite $\cot (- 180)$ in terms of sines and cosines.

$\frac{\cos (- 180)}{\sin (- 180)}$

Step 2

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

$\frac{\cos (- 180)}{\sin (0)}$

Step 3

The exact value of $\sin (0)$ is $0$ .

$\frac{\cos (- 180)}{0}$

Step 4

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

Undefined