Find the exact value of the expression.
-$$\cos \theta = \frac { 1 } { 2 }$$
A) $60 ^ { \circ }$ and $300 ^ { \circ }$
B) $210 ^ { \circ }$ and $330 ^ { \circ }$
C) $60 ^ { \circ }$ and $120 ^ { \circ }$
D) $150 ^ { \circ }$ and $210 ^ { \circ }$

Question

Quizplus · Accepted Answer

The cosine of an angle equals $ \frac { 1 } { 2 }$ at $60 ^ { \circ }$ and $300 ^ { \circ }$, considering the unit circle and the standard positions of angles in trigonometry.

Find the Exact Value of the Expression cos⁡θ=12\cos \theta = \frac { 1 } { 2 }cosθ=21​

Find the Exact Value of the Expression $\cos \theta = \frac { 1 } { 2 }$