Bitsat
Trigonometric Equations
BITSAT 2021
MCQ+3 / -12021
If \({\cos ^3}x\,.\,\sin 2x = \sum\limits_{m = 1}^n {{a_m}\sin mx}\) is identity in x, then
Bitsat
BITSAT 2021
If \({\cos ^3}x\,.\,\sin 2x = \sum\limits_{m = 1}^n {{a_m}\sin mx}\) is identity in x, then