황갈색θ=2,1/(sin&\#178;θ-cos²θ)값

황갈색θ=2,1/(sin&\#178;θ-cos²θ)값

때문에θ=2,그래서 죄θ=2cosθ,
그래서:1/(sin&\#178;θ-cos²θ)=[(sinθ)^2+(cosθ)^2]/[(sinθ)^2-(cosθ)^2]
=5(cosθ)^2/3(cosθ)^2=5/3