Question

Решите систему неравенств: cos(x) < sqrt(3)/2 cos(x) >= -0,5

Answer 1

cos(x) < sqrt(3)/2

П/6+2Пn<x<11П/6+2Пn

 

cos(x) >= -0,5

-2П/3+2Пn<=x<=2П/3+2Пn

 

П/6+2Пn<x<=2П/3+2Пn