3X^2+4X^3y-5y^2+sin(y)=6 求dy/dx

y =(cos^2) x - sin (3^x),求y' sin^2(x+y)-cos(x+y)sin(x+y)-3cos^2(x+y)的值急用 y=x^3sin^2x是奇函数还是偶函数还有y=x^cosx、y=5sin（3x-π/4） 已知sinx=3/5,x∈(π/2,π),求【sin(x+y)+sin(x-y)】/【cos（x+y）+cos（x-y）】的值 判断函数y=sin(2x-5/2Л),y=sin(3x-Л/4),的奇偶性~ 3X^2+4X^3y-5y^2+sin(y)=6 求dy/dx 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) y=sin(3x+2)求y' 求导数y=xcosx^2 y=sin^3(4x+3) y=x^2/(2x+1)^3y=xcosx^2 y=sin^3(4x+3) y=x^2/(2x+1)^3 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? y＝sin(^2)X 还有 y＝sin(^3)(X/2) (cosx)^2-(cosy)^2=1/3求sin(x+y)*sin(x-y). 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) 如果 2sin(x-y)=sin(x+y),证明 tanx= 3 tany sinx=1/3,sin(x+y)=1,求sin（2y+x）=? 已知sinx=1/3,sin(x+y)=1,则sin（2y+x)= siny=1/3,sin(x＋y)=1,求sin(2x＋y) 判断单调性 y=sin(x-π/6) y=sin(-2x+π/3)