Evaluate the cosine of the angle without using a calculator. $30 ^ { \circ }$
A) $\frac { \sqrt { 2 } } { 2 }$
B) $- \frac { \sqrt { 2 } } { 2 }$
C) $\frac { \sqrt { 3 } } { 2 }$
D) $\frac { 1 } { 2 }$
E) 0

Question

Quizplus · Accepted Answer

The cosine of $30^\circ$ is $\frac{\sqrt{3}}{2}$, which is a well-known value from trigonometry.

Evaluate the Cosine of the Angle Without Using a Calculator 30∘30 ^ { \circ }30∘

Evaluate the Cosine of the Angle Without Using a Calculator $30 ^ { \circ }$