y=(2sinx+1)/(2sin-1)怎么变形的sinx=y+1/2(Y-1)
问题描述:
y=(2sinx+1)/(2sin-1)怎么变形的sinx=y+1/2(Y-1)
答
y(2sinx-1)=2sinx+1
2ysinx-y=2sinx+1
2ysinx-2sinx=y+1
2(y-1)sinx=y+1
sinx=(y+1)/2(y-1)