sin(x/2)﹣ cos(x/2)= 更号2
sin(x/2)﹣ cos(x/2)= 更号2
已知sin(x/2)+cos(x/2)=(2*更号3)/3,那么sinx的值为多少?
证明COS(X+Y)COS(X-Y)=COS^2X-SIN^2Y
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)
cos(2x+派/2)=sin(2x)?
求函数fx=(sin^4x+cos^4x+sin^2x*cos^2x)/(2-sin2x)
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
已知函数f(x)=sin^2*x+更号3*sinx*cosx+2cos^2*x.(2)函数f(x)的图像由函数y=sin
(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
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1