Find the Values of ? in Degrees $\left( 0 ^ { \circ } \leq \theta \leq 90 ^ { \circ } \right)$

Multiple Choice

Find the values of ? in degrees $\left( 0 ^ { \circ } \leq \theta \leq 90 ^ { \circ } \right)$ and radians $\left( 0 < \theta < \frac { \pi } { 2 } \right)$ without the aid of a calculator. cos ? = 0 and tan ? = Not defined
?
?

A) 90° = $\frac { \pi } { 2 }$
B) ?60° = $\frac { \pi } { 3 }$
C) ?0° = 0
D) ?30° = $\frac { \pi } { 6 }$
E) ?45° = $\frac { \pi } { 4 }$