ГДЗ по алгебре и начала математического анализа 11 класс Колягин Задание 57

\[1)\sin\frac{7\pi}{10}\ и\ \sin\frac{13\pi}{10}\]

\[\frac{\pi}{2} < \frac{7\pi}{10} < \frac{13\pi}{10} < \frac{3\pi}{2}\]

\[\sin\frac{7\pi}{10} > \sin\frac{13\pi}{10}.\]

\[2)\sin\frac{13\pi}{7}\ и\ \sin\frac{11\pi}{7}\]

\[\frac{3\pi}{2} < \frac{11\pi}{7} < \frac{13\pi}{7} < \frac{5\pi}{2}\]

\[\sin\frac{13\pi}{7} > \sin\frac{11\pi}{7}.\]

\[3)\sin\left( - \frac{8\pi}{7} \right)\ и\ \sin\left( - \frac{9\pi}{8} \right)\]

\[- \frac{3\pi}{2} < - \frac{8\pi}{7} < - \frac{9\pi}{8} < - \frac{\pi}{2}\]

\[\sin\left( - \frac{8\pi}{7} \right) > \sin\left( - \frac{9\pi}{8} \right).\]

\[4)\sin 7\ и\ \sin 6\]

\[\frac{3\pi}{2} < 6 < 7 < \frac{5\pi}{2}\]

\[\sin 7 > \sin 6.\]