若sin^2(x)>cos^2(x),则x的取值范围

若sinx+sin^2x=1,则cos^2x+cos^4x=? 若F(sin x)=3-cos 2x 则F（cos x）=? 若sin x/2 - cos x/2 = 1/3,则sin x=? 若sin x/2-cos x/2=1/3,则sin x= 若函数f(x)=sin(x+α)-2cos(x-α)是奇函数,则sinαcosα= 已知(1+sin x)/cos x=-1/2,则cos/(sin x-1)=? 已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x 化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x 若f(cos x)=cos 2x,则f(sin 15度）的值? 已知(1-cos x+sin x)/(1+cos x+sin x)=-2,若x不等于kπ+(π/2),则tan x= 2cos x (sin x -cos x)+1 y=2cos x (sin x+cos x) 化简sin(x)cos(x)cos(2x) 化简sin(x)cos(x)cos(2x) sin x cos x cos 2x 化简 (sin^2x+cos^2x )(sin^2x-cos^2x)怎么得sin^2x-cos^2x? 已知sin(x)+3cos(x)=2,求sin(x)-cos(x)/sin(x)+cos(x)=? 化简 cos^2(x)*sin^2(x)-sin^2(x)