设f(sinx)=cos2x,则f(根号3/2)等于
若3SinX=CosX,则Cos2X+Sin2X等于?
设f(sinx)=cos2x,则f(1/3)等于?
若f(sinx)=2-cos2x,则f(cosx)等于?
函数y=cosx/根号1-sin2x+根号1-cos2x/sinx-tanx/根号1/cos2x-1
设X为第二象限角 且COSX/2+SINX/2=负的根号5/2求SIN2X+COS2X
已知cos2x=3/5,求sinx^4+cosx^4
若(cos2x)/[sin(x-π/4)]=(-根号2)/2,则cosx+sinx=?
若cos2x/sin(π/4-x)=-根号2/2,则sinx+cosx的值是
若cos2X/sin(X—45度)=根号2/2 则cosX+sinX?
根号2*sinx=sin2x+cos2x 求x
已知sinx/2+cosx/2=2根号3/3,则sinx= ,cos2x= (“/”为除号)