Prove that  n`( " cos  " 4x + " cos  " 3x  + " cos  " 2x)/(" sin " 4x + " sin " 3x + " sin " 2x) =
Channel: Doubtnut
Date: 2020-04-19

Prove that  n`( " cos  " 4x + " cos  " 3x  + " cos  " 2x)/(" sin " 4x + " sin " 3x + " sin " 2x) = " cot  3x`