sin(π/2+θ)=3/5,则cosθ=
问题描述:
sin(π/2+θ)=3/5,则cosθ=
答
sin(π/2+θ)=cosθ
所以cosθ=3/5
sin(π/2+θ)=3/5,则cosθ=
sin(π/2+θ)=cosθ
所以cosθ=3/5