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sin^3x%Cos^3x化简等于多少

解: sin³x-cos³x =(sinx-cosx)(sin²x+sinxcosx+cos²x) =(sinx-cosx)(1+sinxcosx) =sinx+sin²xcosx-cosx-sinxcos²x =sinx-cosx+½sinxsin2x-½cosxsin2x =sinx-cosx-¼(cos3x-cosx)-¼(sin3x+sin...

解:∫sin^3xcos^2xdx =-∫sin^2xcos^2xdcosx =-∫(1-cos^2x)*cos^2xdcosx =-∫(cos^2x-cos^4x)dcosx =(1/5)*cos^5x-(1/3)*cos^3x

也可直接用积化和差公式

为sinx-1/3*sin^3x+C 具体过程看图,有不懂可以问我~~~

sin3x+cos3x =√2(√2/2*sin3x+√2/2cos3x) =√2(sin3xcosπ/4+cos3xsinπ/4) =√2sin(3x+π/4)

原式=sinx+cos(2x+x)=sinx+(1-2sinx平方)cosx+sin2x*sinx,因为sin2x=2sinxcosx,所以原式=sinx+cosx=根号2sin(x+π/4),周期就是2π

利用积化和差公式: sinXsin2Xsin3X = -(1/2)(cos3X-cosX)sin3X 满意请采纳,谢谢!

cosx*cos2x*cos4x = 2 sinx*cosx*cos2x*cos4x / (2sinx) = sin2x * cos2x *cos4x /(2sinx) =......= sin8x / (8sinx) cos3x*cos5x =(1/2) ( cos8x +cos2x) 原式= (1/16) (1/sinx) [ sin8x cos8x + sin8xcos2x ] = (1/32) (1/sinx) [ sin16x + si...

积化和差再积,少年

把这式子进行化简

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