Prove that   ` (i) " sin  " 75^(@) =((sqrt(6)+sqrt(2)))/(4)``(ii) (cos 135^(@) -cos 120^(@))
Channel: Doubtnut
Date: 2020-04-12

Prove that   ` (i) " sin  " 75^(@) =((sqrt(6)+sqrt(2)))/(4)``(ii) (cos 135^(@) -cos 120^(@))/(cos 135^(@) +cos 120^(@)) =(3 -2sqrt(2))`   `(iii)  " tan  " 15^(@) +" cot  " 15^(@) =4`