Solve Trigonometric Equation...4

correct answer is x= π/4

 

What did I do wrong?

 

calculating sin^-1(1/2)

 

I didn't calculate anything. I used Symbolab for my calculation.

 

Symbolab gives you

https://www.symbolab.com/solver/step-by-step/ 2-4sin^{2}\left(x\right)=0 ?or=input

 

Meaning?

 

answer is x= π/4 , don't you see that when you open the link

general solution is x= π/4 +2πn

 

I see it now.