Question

Cos6x=32cos^6x-48cos^4x+18cos^2x-1

Answer 1

"Cos (6x)= 32cos^6 (x) - 48cos^4 (x)+18cos^2 (x) -1

R.H.S. ==> cos (6x) = cos 2 (3x) = 2cos2 (3x) – 1

L.H.S. ==> 32cos6x – 48cos4x + 18cos2x – 1

            => 2 (16cos6x – 24cos4x + 9cos2x) – 1

            => 2 (4cos3x – 3cosx) 2 – 1

            => 2cos2 (3x) – 1

L.H.S. = R.H.S.

Hence, Proved

"

Answer 2

Answer:

Step-by-step explanation: