Find All Solutions in the Interval [0, 2π) $\cos x = \sin \left( \frac { x } { 2 } \right)$

Multiple Choice

Find all solutions in the interval [0, 2π) .
- $\cos x = \sin \left( \frac { x } { 2 } \right)$

A) $0 , \frac { \pi } { 2 } , \pi , \frac { 3 \pi } { 2 }$
B) $\frac { \pi } { 3 } , \frac { 5 \pi } { 3 }$
C) $\frac { \pi } { 6 } , \frac { 3 \pi } { 2 } , \frac { 7 \pi } { 6 }$
D) $\frac { \pi } { 3 } , \pi , \frac { 5 \pi } { 3 }$