show-that-1-3sin-2-xcos-2-x-5-8-3-8-cos4x-

Question Number 76012 by mathocean1 last updated on 22/Dec/19

show that

1 - {3 \sin}^{2} x \cos^{2} x = \frac{5}{8} + \frac{3}{8} \cos 4 x

Answered by benjo last updated on 22/Dec/19

1 - 3 / 4 ({s i n}^{2} 2 x) =

1 - 3 / 4 (1 - c o s 4 x) / 2

5 / 8 + 3 / 8 c o s 4 x

Commented by mathocean1 last updated on 22/Dec/19

please how have you done to have

the first line ?

Commented by benjo last updated on 22/Dec/19

Facebook Tweet Pin