Решите уравнение: \(\huge { cosx= - {{ \sqrt {3}} \over {2}}}.\) \(\huge {x= \pm {{ 5\pi} \over {6}} +2 \pi k, k \in Z}\) \(\huge {x= \pm {{ \pi} \over {6}} +2 \pi k, k \in Z}\) \(\huge {x= \pm {{ 3\pi} \over {4}} +2 \pi k, k \in Z}\) \(\huge {x= \pm {{ 2\pi} \over {3}} +2 \pi k, k \in Z}\) \(\huge {x= \pm {{\pi} \over {3}} +2 \pi k, k \in Z}\)

Задание

Решите уравнение: \(\huge { cosx= - {{ \sqrt {3}} \over {2}}}.\)

\(\huge {x= \pm {{ 5\pi} \over {6}} +2 \pi k, k \in Z}\)
\(\huge {x= \pm {{ \pi} \over {6}} +2 \pi k, k \in Z}\)
\(\huge {x= \pm {{ 3\pi} \over {4}} +2 \pi k, k \in Z}\)
\(\huge {x= \pm {{ 2\pi} \over {3}} +2 \pi k, k \in Z}\)
\(\huge {x= \pm {{\pi} \over {3}} +2 \pi k, k \in Z}\)