Find the Exact Value of the Expression $\sec \theta$ Is Undefined
A)

Multiple Choice

Find the exact value of the expression.
- $\sec \theta$ is undefined

A) $0 ^ { \circ }$
B) $90 ^ { \circ }$ and $270 ^ { \circ }$
C) $90 ^ { \circ }$
D) $0 ^ { \circ }$ and $180 ^ { \circ }$