Answer:
The solutions are 270° and 450°.
Step-by-step explanation:
Given:
[tex]cos\frac{x}{2} =\frac{\sqrt{2} }{2}[/tex].
So, the second and third quadrant angle to be calculated.
[tex]cos\frac{x}{2}=135[/tex]
[tex]=x=270[/tex]°.
And, [tex]cos\frac{x}{2}=225[/tex]
[tex]=x=450[/tex]°
Therefore, the solutions are 270° and 450°.
