设f(θ)=(2cos^3θ+sin^2(2π-θ)+sin(π/2+θ)-3)/(2-2cos^2(π+θ)+cos(
θ∈(0,π/2),比较cosθ、sin(cosθ)、cos(sinθ)的大小
sin(π-θ)+cos(2π-θ)/cos(5π/2-θ)+sin(3π/2+θ)=2,则sinθcosθ=_____
已知 sin(θ+kπ)=-2cos (θ+kπ) 求 ⑴4sinθ-2cosθ/5cosθ+3sinθ; ⑵(1/4)
已知(4sinθ-2cosθ)/(3sinθ+5cosθ)=6/11,求5cos^2θ/(sin^2θ+2sinθcos
设f(α)=2sinαcosα+cosα/1+sin²α+cos(3π/2+α)-sin²(π/2+
化简:1+sinθ+cosθ+2sinθcosθ /1+sinθ+cosθ
已知tanθ=3,求(3cosθ-5sin^2θcosθ)/sin(π-θ)的值
(sinθ+cosθ)/(sinθ-cosθ)=2,则sin(θ-5π)*sin(3π/2-θ)=
若(sinθ+cosθ)/(sinθ-cosθ)=2,则sin(θ-5π)*sin(3π/2-θ)等于?
已知2sinθ+3cosθ=2,求sinθ+cosθ的值
sinθ-cosθ=1/2,则sin^3θ-cos^3θ=?.
已知sinθ+2cosθsinθ−cosθ=3,求值: