sin^2x小于等于cos^2x 求x范围
sin^2x小于等于cos^2x 求x范围
已知sin X+cos X=m,|m|小于等于根号2且|m|不等于1,求sin X^3+cos X^3,sin X^4+
sinx小于等于cos x 范围x小于等于2π大于等于0
已知sin x+cos x=1/5,且0小于等于X小于等于pi,求sin x-cos x
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
|cos x|=sin(3π/2-x),求角x的取值范围
2sin^2x+cos^2y=1,求sin^2x+cos^2y的取值范围
cosx小于等于负1/2 求x范围
sin(x)/(1+cos(x))= -1 -pi小于等于x小于等于pi
x+y=sinα+2cosα +2,求x+y的范围
已知sin^2(x)+cos(x)+m=0有实数解,求m范围
sin^3x-cos^3x≥cosx-sinx,求x的取值范围.x∈{0,2π}