求不定积分∫sin³xdx

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求不定积分∫sin³xdx
求不定积分∫sin³xdx

求不定积分∫sin³xdx

 

= -(sinx)^2 d cosx
= (cosx)^2 - 1 dcosx
= (cosx)^3/3 - cosx

= -(sinx)^2 d cosx
= (cosx)^2 - 1 dcosx
= (cosx)^3/3 - cosx