Question

Решить неравенство:

2sin 2x ≥ -1

Answer 1

2sinx≥-1
sinx≥-1/2
x∈(-π/6+2πn;7π/6+2πn)

Answer 2

$2sinx \geq -1$
$sinx \geq - \frac{1}{2}$
$- \frac{ \pi }{6} +2 \pi n \leq x \leq \frac{7 \pi }{6} +2 \pi n$ n∈Z