已知sin x+cos x=1/5 且π/2

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+ 已知 向量m=(cos x/2,cos x/2),向量n=(cos x/2,sin x/2) 且x∈[0,π],而f(x 已知向量a=[cos(3x/2),sin(3x/2)],b=[cos(x/2),-sin(x/2),]且x∈[0,π/2 已知向量a=(cos(3x/2),sin(3x/2)),b=(cos(x/2),-sin(x/2)),且x∈[0,π/2 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 已知函数f(x)=[6cos(π+x)+5sin^(π-x)-4]/cos(2π-x),且f(m)=2,求f(-m)的值 已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x 已知sin(x+π/3)cos(x-π/3)+cos(x-π/3)sin(x-π/3)=-(2根号2/3)且π 已知sinx+cosx=1/5,且3/2π＜x＜2π,求1/(cos^2x)-1/(sin^2x)的值 已知cos（x+45º)=3／5且17π/12＜x＜7π/4,求sin2x+2sin²x／1-tan 已知cos(π/2+x)=sin(x-π/2) 求sin^3(π-x)+cos(x+π)/5cos(5π/2-x)+3s 已知函数f(x)=2sin(x/4)cos(x/4)-2√3sin²（x/4)+√3,且g(x)=f(x+π/