Prove that   `(cos 9^(@)+ sin 9^(@))/(cos 9^(@)  -sin 9^(@)) = tan  54^(@)`
Channel: Doubtnut
Date: 2020-04-19

Prove that   `(cos 9^(@)+ sin 9^(@))/(cos 9^(@)  -sin 9^(@)) = tan  54^(@)`