Cos(x-p/6)amp;gt;-1/2 решить неравенство

cos(2x- \frac \pi6) \geq - \frac1 \sqrt2 \\ cos(2x- \frac \pi6) \geq - \frac \sqrt22 \\ \frac3 \pi 4 \leq 2x- \frac \pi6 \leq -\frac3 \pi 4 \\ \frac11 \pi 12 \leq 2x \leq -\frac7 \pi 12 \\ \frac11 \pi 24 \leq x \leq -\frac7 \pi 24
Ответ: \frac11 \pi 24 \leq x \leq -\frac7 \pi 24