∫x(sinx)^2dx=

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2024-12-05 00:56:28
推荐回答(2个)
回答1:

∫xsin²xdx
=(1/2)∫x(1-cos2x)dx
=(1/2)∫xdx-(1/2)∫ xcos2xdx
=(1/4)x²-(1/4)∫ xd(sin2x)
=(1/4)x²-(1/4)xsin2x+(1/4)∫ (sin2x)dx
=(1/4)x²-(1/4)xsin2x-(1/8)cos2x+C

回答2:

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