Find all values of , if is in the interval [0, 360°) and has the given function value.
-$\cos \theta = \frac { 1 } { 2 }$
A) $60 ^ { \circ }$ and $120 ^ { \circ }$
B) $60 ^ { \circ }$ and $300 ^ { \circ }$
C) $150 ^ { \circ }$ and $210 ^ { \circ }$
D) $210 ^ { \circ }$ and 330

Question

Quizplus · Accepted Answer

The cosine function equals $ \frac { 1 } { 2 }$ at $60 ^ { \circ }$ and $300 ^ { \circ }$ within the interval [0, 360°), corresponding to the first and fourth quadrants where cosine is positive.

Find All Values of , If Is in the Interval cos⁡θ=12\cos \theta = \frac { 1 } { 2 }cosθ=21​

Find All Values of , If Is in the Interval $\cos \theta = \frac { 1 } { 2 }$