(sinβ-cosβ)/(sinβ+cosβ)=1/3sinβ+cosβ=3(sinβ-cosβ)sinβ+cosβ=3sinβ-3cosβ4cosβ=2sinβtanβ=2sin^β-4sinβcosβ+2=(sin²β-4sinβcosβ)/(sin²β+cos²β)+2=(tan²β-4tanβ)/(t...