已知sin(x+π/4)=-5/13,则sin2x的值?

已知sin(π/4--x)=5/13,0 已知sin(π/4-x)=5/13,且0 已知sin(x+π/6)=1/4,求sin(5π/6-x)+sin^2(π/3-x) 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sinα（x+π/6）=1/4,则sin（5π/6-x）+sin（π/3-x）的平方=? 已知sin(x+π/4)=3/5,sin(x-π/4)=4/5 ,则tanx= 已知sin(x+π/4)=-5/13,则sin2x的值? 已知sin(x+π/4)=-5/13,则sin2x的值等于? 已知sin(x-4/π)=3/5,则sin2x=已知答案等于7/25 已知sin(π/4+x)=12/13(π/4 已知sin(π/4-x)=12/13,0 已知sin(π/4-x)=12/13,0 已知sin(x+π)=4/5,且sinxcosx 已知sin(TT/4+x)=5/13,0 已知sin(π/4+x)sin(π/4-x)=1/6,x(π/2,π),则sin4x=? 已知sin(x+π/6)=1/3,则sin(5/6π-x)+cos2(π/3-x)=? 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