Integral: ∫ cosx cos^2⁡ (sinx)dx ∫ sinx cos^2⁡ (cosx) dx ∫ cosx sin^2⁡ (sinx)dx ∫sinx sin^2⁡(cosx)dx

Here is the technique to solve these 4 integrals by integration by substitution
∫ cosx cos^2⁡ (sinx) dx
∫ sinx cos^2⁡ (cosx) dx
∫ cosx sin^2⁡ (sinx) dx
∫ sinx sin^2⁡ (cosx) dx

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