Evaluate ∫0π/2sin(x)cos2(x)dx\int_0^{\pi/2} \sin(x) \cos^2(x) dx∫0π/2sin(x)cos2(x)dx using the substitution u=cos(x)u = \cos(x)u=cos(x).
1/31/31/3
1/21/21/2
2/32/32/3
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