If $\sin \theta = \frac { \sqrt { 2 } } { 2 }$

Multiple Choice

If $\sin \theta = \frac { \sqrt { 2 } } { 2 }$ ,find the value of ? in degrees $\left( 0 ^ { \circ } < \theta < 90 ^ { \circ } \right)$ without the aid of a calculator.

A) ? = 30°
B) ?? = 45°
C) ??? = 90°
D) ??? = 75°
E) ??? = 15°