Evaluate csc(180 degrees )

$\csc (180 °)$

Rewrite $\csc (180 °)$ in terms of sines and cosines.

$\frac{1}{\sin (180 °)}$

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

$\frac{1}{\sin (0)}$

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

$\frac{1}{0}$

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

Undefined