prove-that-sin-x-cos-2x-1-4sin-4x-sec-x-

Question Number 85623 by jagoll last updated on 23/Mar/20

prove that

\sin x \cos 2 x = \frac{1}{4 \sin 4 x \sec x}

Answered by Henri Boucatchou last updated on 23/Mar/20

W r o n g S i r;

T a k e x = \frac{π}{4}, 0 \neq \frac{1}{0}