化简cos 2x
化简tan(3x/2)-tan(x/2)-sinx/(cos(3x/2)*cos(x/2))
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 1/2cos x-根号3/2sin x 根3sin x+cos x
化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x))
化简2sin^2(x)sin^2(φ)+2cos^2(x)cos^2(φ)-cos2(x)cos^2(φ)
化简(tanx+cotx)cos^2x
化简2*(sinxcosx-cos平方x)+1
化简 根号3sinXcosX+cos*2X
化简:1+sin(x-360度)cos(x-270度)-2cos平方x
化简 cos^2(x)*sin^2(x)-sin^2(x)
化简 cos^(2)(x)*sin^(2)(x)-sin^(2)(x)