Solve the multi-angle equation below.
$\cos \left( \frac { x } { 2 } \right) = \frac { \sqrt { 2 } } { 2 }$
A) $\frac { \pi } { 3 } + n \pi , \frac { 7 \pi } { 3 } + n \pi$, where $n$ is an integer
B) $\frac { \pi } { 3 } + 2 n \pi , \frac { 7 \pi } { 3 } + 2 n \pi$, where $n$ is an integer
C) $\frac { \pi } { 2 } + n \pi , \frac { 7 \pi } { 3 } + n \pi$, where $n$ is an integer
D) $\frac { \pi } { 2 } + n \pi , \frac { 7 \pi } { 2 } + n \pi$, where $n$ is an integer
E) $\frac { \pi } { 2 } + 4 n \pi , \frac { 7 \pi } { 2 } + 4 n \pi$, where $n$ is an integer

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The Answer of Solve the multi-angle equation below.
$\cos \left( \frac { x } { 2 } \right) = \frac { \sqrt { 2 } } { 2 }$
A) $\frac { \pi } { 3 } + n \pi , \frac { 7 \pi } { 3 } + n \pi$, where $n$ is an integer
B) $\frac { \pi } { 3 } + 2 n \pi , \frac { 7 \pi } { 3 } + 2 n \pi$, where $n$ is an integer
C) $\frac { \pi } { 2 } + n \pi , \frac { 7 \pi } { 3 } + n \pi$, where $n$ is an integer
D) $\frac { \pi } { 2 } + n \pi , \frac { 7 \pi } { 2 } + n \pi$, where $n$ is an integer
E) $\frac { \pi } { 2 } + 4 n \pi , \frac { 7 \pi } { 2 } + 4 n \pi$, where $n$ is an integer

Solve the Multi-Angle Equation Below cos⁡(x2)=22\cos \left( \frac { x } { 2 } \right) = \frac { \sqrt { 2 } } { 2 }cos(2x​)=22​​

Solve the Multi-Angle Equation Below $\cos \left( \frac { x } { 2 } \right) = \frac { \sqrt { 2 } } { 2 }$