求xcosx/sin^2 xdx求详解

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求xcosx/sin^2xdx求详解求xcosx/sin^2xdx求详解求xcosx/sin^2xdx求详解∫xcosx/sin^2xdx=-∫xd(1/sinx)=-x/sinx+∫1/sinxdx

求xcosx/sin^2 xdx求详解
求xcosx/sin^2 xdx
求详解

求xcosx/sin^2 xdx求详解
∫xcosx/sin^2 xdx
=-∫xd(1/sinx)=-x/sinx+∫1/sinxdx=-x/sinx+∫cscxdx=-x/sinx+ln|cscx-cotx|+c