化简1/2sin2x-1/2cos2x= (√2/2)sin(2x-π/4)
化简:2cos2x+2sin^2 x+cos(-x)分之sin2x+sin(π-x)=___________
已知函数fx=(1+cos2x+sin2x)/sin(x+π/2)
(SIN2X)^2+SIN2X+COS2X=1求角X
已知sin^2x+sin2x*sinx+cos2x=1,x属于(0,派/2),求tan2x
函数f(x)=(1+cos2x+8sin^2x)/sin2x的值域为
两个个数学证明题1.证明:cos2x+sin2x=√2sin(sin2x+π/4)2.证明:αsinαx+cosαx=√
sinx-2cosx=0.求sin2x-cos2x/1+sin^2x
已知:sinx-2cosx=0,求sin2x-cos2x/1+sin平方x
sin2x/3+cos2x/3=√2sin(2x/3+π/4) 求其化简过程
已知tan(x-π/4)=2 求(sin2x+cos2x)/(2cos²x-3sin2x-1)
已知函数f(x)=(sin2x+cos2x+1)/2cosx,
(1+cos2x)/2cosx=sin2x/(1-cos2x)