为什么y = x - sin(x/2)cos(x/2) = x - (1/2)sin(x) 其中sin(x/2)cos(
为什么y = x - sin(x/2)cos(x/2) = x - (1/2)sin(x) 其中sin(x/2)cos(
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
sin(x+y)sin(x-y)=k,求cos^2x-cos^2y
Sin x-sin y=2/3 cos x-cos y=1/2 求cos(x-y)
求导y=(1+sin^2 x)/(cos(x^2))
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).
证明COS(X+Y)COS(X-Y)=COS^2X-SIN^2Y
求证(cos^2 x-sin^2 x)(cos^4 x+sin^4 x)+1/4 sin 2x sin 4x=cos 2
MATLAB画图,y=sin(x)*(cos(x)-1)/((2*sin(x.^2)+4*cos(x)).^0.5)-(
y =(cos^2) x - sin (3^x),求y'
证明(1-2sin x cos x )/(cos^2x-sin^2x)=(1-tan x)/(1+tan x)