Question

$16 \sqrt{2} cos \frac{\pi}{4} cos \frac{2\pi}{3}$

Answer 1

$16 \sqrt{2}cos \frac{ \pi }{4} cos \frac{2 \pi }{3} =16 \sqrt{2}* \frac{ \sqrt{2}}{2} *(-0.5)=-16/2=-8$