Solve the Equation for Exact Solutions Over the Interval [0 $\cos x = \sin x$

Solve the equation for exact solutions over the interval [0, 2π) .
- $\cos x = \sin x$

A) $\left\{ \frac { \pi } { 4 } , \frac { 7 \pi } { 4 } \right\}$
B) $\left\{ \frac { 3 \pi } { 4 } , \frac { 7 \pi } { 2 } \right\}$
C) $\left\{ \frac { 3 \pi } { 4 } , \frac { 5 \pi } { 4 } \right\}$
D) $\left\{ \frac { \pi } { 4 } , \frac { 5 \pi } { 4 } \right\}$