Question

Помогите пожалуйста ❤️❤️❤️❤️❤️

Answer 1

$sin(x+frac{pi}{4})leq frac{sqrt2}{2}\\frac{3pi}{4}+2pi nleq x+frac{pi}{4}leq frac{9pi }{4}+2pi n; ,; nin Z\\frac{pi }{2}+2pi nleq xleq 2pi +2pi n; ,; nin Z\\xin [; frac{pi }{2}+2pi n; ;; 2pi +2pi n; ]; ,; nin Z$