Question

Вычислите 8sin 7П/12 cos 7П/12

Answer 1

8sin 7П/12 cos 7П/12= 4 * (2 sin 7П/12 cos 7П/12) = 4* sin (2*7П/12)=
=4 * sin 7П/6= 4 * (-1/2) = - 2

Answer 2

Спасибо большое