怎样将sin(2x+60°)变成cos(2x+60°)
证明COS(X+Y)COS(X-Y)=COS^2X-SIN^2Y
怎样证明sinx^2,sin(x绝对值),cos(根号x)不是周期函数
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
化简sin(2π+x)cos(π-x)sin(π-x)/cos(x-π)sin(-π-x)sin(π+x)
1.y=cos(2x+60°)+sin x平方.化简.
Y=sin(x+15度)+根号2cos(x+60度)最大值
函数f(x)=根号3sinωx+cosωx(ω>0)怎样变为f(x)=2sin(ωx+π/6)
cos(2x+派/2)=sin(2x)?
求函数fx=(sin^4x+cos^4x+sin^2x*cos^2x)/(2-sin2x)
(急)数学化简题根号3 sin x+cos x1-2sin2 x+sin x cos x注:sin2 x是sin平方x
化简:1+sin(x-360度)cos(x-270度)-2cos平方x