π/4+x的范围是5π/3
已知cos(π/4+x)=3/5,x∈(3π/4,7π/4),求sin2x+2Sin^x /1-tanx的值
1个回答
相关问题
-
已知cos(π/4+x)=3/5,5/4π<x<7π/4,求(sin2x+2sin²x)/(1-tanx)
-
已知cos(x+π/4)=3/5,5π/4<x<7π/4,求 sin2x+2sin²x ÷ 1-tanx 的值
-
已知cos(π/4+x)=3/5,17π/12<x<7π/4,求sin2x+2sin平方x/(1-tanx)的值
-
已知cos(π/4+x)=4/5,x∈(-π/2,-π/4).求(sin2x-2sin²x)/(1+tanx)
-
已tanx=4/3,求cos(2x-π/3)cos(π/3-x)-sin(2x-π/3)sin(π/3-x)
-
已知cos(π/4+x)=3\5,求(sin2x-2sin^x)/1-tanx的值
-
已知cos(x+π/4)=3/5,π/2<x<3π/2,求sin(2x+π/4)的值
-
若cos(π/4+x)=3/5,17/12π<x<7/4π,求(sin2x+2sinx)/(1-tanx)的值
-
若cos(π/4+x)=3/5,17π/12<x <7π/4,求(sin2x+2cosx)/1-tanx的值
-
已知sin(x-π/4)=3/5,∈(π/4,π/2),求cos2x的值?