Use the given triangles to evaluate the expression. Rationalize all denominators.
-$\cos \frac { \pi } { 6 }$
A) $\frac { \sqrt { 3 } } { 2 }$
B) $\sqrt { 3 }$
C) $\frac { 2 \sqrt { 3 } } { 3 }$
D) $\frac { \sqrt { 2 } } { 2 }$

Question

Use the given triangles to evaluate the expression. Rationalize all denominators. 
-$\cos \frac { \pi } { 6 }$
A) $\frac { \sqrt { 3 } } { 2 }$ 
B) $\sqrt { 3 }$ 
C) $\frac { 2 \sqrt { 3 } } { 3 }$ 
D) $\frac { \sqrt { 2 } } { 2 }$

Quizplus · Accepted Answer

The cosine of $\frac{\pi}{6}$ radians (or 30 degrees) is $\frac{\sqrt{3}}{2}$.

Use the Given Triangles to Evaluate the Expression cos⁡π6\cos \frac { \pi } { 6 }cos6π​

Use the Given Triangles to Evaluate the Expression $\cos \frac { \pi } { 6 }$