已知sin(π/2-x)+sin(π-x)/cos(-x)+sin(2π-x)=2009,则tan(x+5π/4)等于?已知sin(π/2-x)+sin(π-x)/cos(-x)+sin(2π-x)=2009,则tan(x+5π/4)等于（） A.-2009 B.-1/2009 C.1/2009 D.2009

已知函数f(x)=(1+1 anx)sin^2x+m sin(x+π/4)sin(x-π/4) 已知-π/2＜x＜0,sin x+cos x=1/5求sin 2x+2 sin 已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x) 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 已知函数f(x)=2根号3sin平方x-sin（2x-π/3) 已知函数F(X)=SIN(2X+φ)(-π 已知函数f（x）=［2sin（x-π/6）+√3sin x］cos x+sin^2x,x∈R 已知F(X)=根号3COS^2 X+SIN XCOS X-2SIN X*SIN(X-π/6),求F(X)的最大值 sin^2(π/3-x)+sin^2(π/6+x) 2sin(x+π/4)sin(x-π/4)=? sin^2(π/4 +x) sin(πx/2)求导 已知tanx=3,则[sin(π+x)-2sin(π/2+x)]/[sin(7π-x)+sin(7π/2-x)]已知tanx=3,则[sin(π+x)-2sin(π/2+x)]/[sin(7π-x)+sin(7π/2-x)]的值是 化简 sin²x+sin²(x+2π/3)+sin²(x-2π/3) 已知函数f(x)=sin(2x+π/6)+sin（2x+π/6）+2cos²x 已知函数f(x)=(√3sinωx+cosωx)*sin(-3π/2+ωx)（0 已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x sin(x+π/4)