化简1—-cos(2X)+sin(2X)
化简 1/2cos x-根号3/2sin x 根3sin x+cos x
化简1—-cos(2X)+sin(2X)
化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x
化简 cos^2(x)*sin^2(x)-sin^2(x)
化简 cos^(2)(x)*sin^(2)(x)-sin^(2)(x)
2cos x (sin x -cos x)+1
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
化简f(x)=2cos(x/2)·(sin(x/2)+cos(x/2))-1
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
化简:1+sin(x-360度)cos(x-270度)-2cos平方x
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
求证(cos^2 x-sin^2 x)(cos^4 x+sin^4 x)+1/4 sin 2x sin 4x=cos 2