sin-xcos-xcos-2x-a-any-price-to-a-is-corect-the-answer-a-

Question Number 166719 by mathlove last updated on 26/Feb/22

\sin x \cos x \cos 2 x = a

a n y p r i c e t o a

i s c o r e c t t h e a n s w e r a = ?

Commented by cortano1 last updated on 26/Feb/22

\sin 2 x \cos 2 x = 2 a

\sin 4 x = 4 a

a = \frac{\sin 4 x}{4}