y=sin^2(x/3)cot(x/2) 求导

y=sin^2(x/3)cot(x/2) 求导 证明(1+cot^2x)/(1-cot^2x)=1/(2sin^2x-1) ∫(cot^2 x/sin^2 x)dx=? 谁能帮我解一下这道题(sin(x+y))/(sin x sin y) = cot y + cot x 证 (sin^2x+sinx cosx -cotx)/(sin^2x-sinx cosx+cotx)=(1-cot^3 x)/(cot^3 x +1) 已知角θ终边为射线4x+3y=0(x>0),求(sinθ+cotθ)sinθ+(cosθ)^2值 y=cot^2乘3分之x-1求导 设z=x^2y,而x=cot t,y=sin t,求dz/dt 如何用matlab画二维图y=sqrt(25/sin(x)^2-(5cot(x)-1.8)^2)-5; cot^2x=2tan^2y+1 求sin^2y+2sin^2x可以的话请写上过程 f(a)=[sin(π-x)cos(2π-x)tan(-x+3π/2)]/cot(-x -π)sin(-π--x) 化简 求证:sin(x-y)sin(x+y)/sin²xcos²y=1-cot²xtan²y cos(x)=-(1/8),π< x < (3π)/2sin(x)=?tan(x)=?cot(x)= sec(x)= csc(x)= 证明(tan^2x-cot^2x)/(sin^2x+cos^2x)=sec^2x+csc^2x y=cot(x/2)^(1/2)求导 y=根号下cot(x/2),求导 设y=(tan2x)^cot(x/2) ,求dy/dx 若角α的顶点在原点,始边与x轴正半轴重合,终边为4x+3y=0(x>0),则sinα(sinα+cotα)+(cosα)^2