2√3sinxcosx+2cos²x-1 =√3sin2x+cos2x =2sin(2x+π/6)
已知函数f(x)=cos(2x+π/3)+sin2x-cos2x+2√3sinxcosx
已知函数f(x)=sin2X+√3sinXcosX+2cos2X,X属于R
要得到函数y=2cos(x+π/6)sin(π/3-x)-1的图像只需将函数 y=1/2sin2x+√3/2cos2x
化简:2cos2x+2sin^2 x+cos(-x)分之sin2x+sin(π-x)=___________
三角函数化简问题5√3sinxcosx+5cos²x+5/2 =5/2(√3sin2x+cos2x)+5 =5
已知tan(x-π/4)=2 求(sin2x+cos2x)/(2cos²x-3sin2x-1)
1.y=cos^4x+sin^4x 求周期 2.y=(sin2x+sin(2x+π/3))/( cos2x+cos(2x
两个个数学证明题1.证明:cos2x+sin2x=√2sin(sin2x+π/4)2.证明:αsinαx+cosαx=√
求函数y=[sin2x+sin(2x+π/3)]/[cos2x +cos(2x+π/3)]的最小正周期
函数f(x)=-√2(sin2x+π/4)+6 sin x cos x-2cos²x+1
已知2sin²x-cos²x+sinxcosx-4sinx+2cosx=0求(sin2x+1)/(1
sinx+cosx=1/5,x属于(π/2,3π/4),求sinxcosx,sin2x,cos2x,sinx,cosx