y=cos^x-sin^x+sin2x+3
求函数 y=sin3x*sin^3x+cos3xcos^x/cos^22x +sin2x
1.y=cos^4x+sin^4x 求周期 2.y=(sin2x+sin(2x+π/3))/( cos2x+cos(2x
求函数y=[sin2x+sin(2x+π/3)]/[cos2x +cos(2x+π/3)]的最小正周期
Y=sin^2x+sin2x+2cos^2x化简
已知函数y=sin²x+sin2x+3cos²x.求
设函数f(x)=sin²x+sin2x+3cos²x(x∈R).
已知 兀/2 < Y < X< 3兀/4,cos(X+Y)=12/13,sin(X+Y)=-3/5,求sin2X.
已知 兀/2 < Y < X< 3兀/4,cos(X-Y)=12/13,sin(X+Y)=-3/5,求sin2X.
设函数f(x)=sin²x+2sin2x+3cos²x 化简
设函数fx=sin²x+sin2x+3cos²x (x∈R)
y=sin^2X+sin2X+3怎么求最值?
求函数Y=sin^4x +cos^4x +sin^2x cos^2x 除以2-sin2x的最小正周期,最大值最小值