How do I find this integral using weierstrass substitution?

1/9-4((sinx)^2)

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  1. Let f(x)=cosxsqrt(1+sinx).A. Let F(x)=the integral of f(x)dx and F(0)=5/3, find F(pi/2). I got 3.386 with U-substitution B. If
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  2. That's the same as the integral of sin^2 x dx.Use integration by parts. Let sin x = u and sin x dx = dv v = -cos x du = cos x dx
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