Find the exact value of the expression.
-$$\cos \theta = \frac { \sqrt { 3 } } { 2 }$$
A) $225 ^ { \circ }$ and $315 ^ { \circ }$
B) $135 ^ { \circ }$ and $225 ^ { \circ }$
C) $45 ^ { \circ }$ and $225 ^ { \circ }$
D) $30 ^ { \circ }$ and $330 ^ { \circ }$

Question

Quizplus · Accepted Answer

The cosine of an angle is positive in the first and fourth quadrants. The value $\frac{\sqrt{3}}{2}$ corresponds to a $30^\circ$ angle in standard position. Thus, the angles are $30^\circ$ and $360^\circ - 30^\circ = 330^\circ$.

Find the Exact Value of the Expression cos⁡θ=32\cos \theta = \frac { \sqrt { 3 } } { 2 }cosθ=23​​

Find the Exact Value of the Expression $\cos \theta = \frac { \sqrt { 3 } } { 2 }$