Question

срочно помогите пожалуйста​

Answer 1

Ответ:

τ∈

$[-\frac{5\pi}{6} +2\pi n;-\frac{\pi}{2}+2\pi n)V[-\frac{\pi}{3}+2\pi n;-\frac{\pi}{6}+2\pi n).$

Пошаговое объяснение:

$... \ = > \ \left \{ {{-\frac{\pi}{3} +\pi n\leq \tau\leq \frac{\pi}{2} +\pi n} \atop {-\frac{5\pi}{6} +2\pi n\leq \tau\leq-\frac{\pi}{6} +2\pi n}} \right. \ = > \ \tau \exists[-\frac{5\pi}{6} +2\pi n;-\frac{\pi}{2}+2\pi n)V[-\frac{\pi}{3}+2\pi n;-\frac{\pi}{6}+2\pi n).$