Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.
-$\csc 1,080 ^ { \circ }$
A) 2
B) $\sqrt { 2 }$
C) 1
D) undefined

Question

Quizplus · Accepted Answer

The cosecant function, $\csc$, is undefined for angles where the sine function, $\sin$, is 0. Since $\sin 1,080^\circ = \sin (3 \times 360^\circ + 0^\circ) = \sin 0^\circ = 0$, $\csc 1,080^\circ$ is undefined.

Use the Fact That the Trigonometric Functions Are Periodic to Find