Question

Помогите плизззз 2+3cosx=0

Answer 1

$2 + 3cos(x) = 0 \ 3 cos(x) = - 2 \ cos(x) = - frac{2}{3} \ x = + - arccos( - frac{2}{3} ) + 2pi : n \ x = + - (pi - arccos frac{2}{3} ) + 2pi : n$

n принадлежит Z