What is the indefinite integral of the square of (SiN x) with respect to x Can you give me some ideas

（sin x)^2dx=x/2-1/4*sin(2x)+C
If you don't believe it, you can ask for a guide
Because D (COS (x)) = sin (x)
So (sin (x)) ^ 2DX = sin (x) d (COS (x))
=√(1-cos(x)^2)d(cos(x))
It is transformed into the form of √ (a ^ 2-x ^ 2) DX

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