How do we integrate Sin^2 dx and Cos^2 dx?

Answer 1

You have 2 methods

1) Integrate by parts using Sin(x)* Sin(x) , Cos(x)*Cos(x)

2) Use the half angle formulas............Sin²(x) = (1 - cos(2x))/2 and Cos²(x) = (1 + Cos(2x))/2