integration sin²x cos³x dx
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ʃ sin²x cos²x cosx dx
ʃ sin²x (1-sin²x) cosx dx
Let u=sinx
du = cosxdx
ʃu²(1-u²)du
ʃ(u²-u⁴)du
ʃ(u²-u⁴)du
⅓ u³ - ⅕u⁵ + C
⅓ sin³x - ⅕sin⁵x + C
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