sin(5x)-sin(3x)= 根号2cos(4x)
sin(5x)-sin(3x)= 根号2cos(4x)
根号下(sin""x+4cos"x)-根号下(cos""x+4sin"x)=?
已知sin X+cos X=m,|m|小于等于根号2且|m|不等于1,求sin X^3+cos X^3,sin X^4+
已知函数f(x)=sin平方+根号3 sin x cos x+2cos平方x,x∈R
已知函数f(x)=sin^2*x-根号3*sinπ/4*x*cosπ/4*x
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
化简 1/2cos x-根号3/2sin x 根3sin x+cos x
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
求化简f(x)=sin^2x+2根号3sin(x+π/4)cos(x-π/4)-cos^2x-根号3
f(x)=sin平方x+2根号3sin(x+π/4)cos(x-π/4)-cos平方x-根号3
函数f(x)=负根号3sin ^2x+sin x cos x f(a/2)=1/4-根号3/2求sin a值
根号3sin x+cos x要化简