Find All Values of θ, If θ Is in the Interval

Find all values of θ, if θ is in the interval [0, 360°) and has the given function value.
- $\cos \theta = \frac { 1 } { 2 }$

A) $150 ^ { \circ }$ and $210 ^ { \circ }$
B) $60 ^ { \circ }$ and $120 ^ { \circ }$
C) $60 ^ { \circ }$ and $300 ^ { \circ }$
D) $210 ^ { \circ }$ and $330 ^ { \circ }$

Correct Answer:

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