2. Выразите в градусной мере величины углов: 2.1. \(\frac{7\pi}{6},-\frac{\pi}{5},0{,}3\pi\); 2.2. \(\frac{5\pi}{18},-\frac{7\pi}{9},0{,}2\pi\); 2.3. \(\frac{5\pi}{9},-\frac{11\pi}{18},1{,}4\pi\); 2.16. \(\frac{5\pi}{3},-\frac{\pi}{3},0{,}4\pi\); 2.17. \(\frac{19\pi}{36},-\frac{7\pi}{6},1{,}1\pi\); 2.18. \(\frac{\pi}{3},-\frac{13\pi}{18},1{,}25\pi\).

Переводим радианы в градусы по формуле: \(x\text{ рад}=x\cdot\frac{180^\circ}{\pi}\).

1. 2.1. \(\frac{7\pi}{6}=210^\circ\); \(-\frac{\pi}{5}=-36^\circ\); \(0{,}3\pi=54^\circ\).
2. 2.2. \(\frac{5\pi}{18}=50^\circ\); \(-\frac{7\pi}{9}=-140^\circ\); \(0{,}2\pi=36^\circ\).
3. 2.3. \(\frac{5\pi}{9}=100^\circ\); \(-\frac{11\pi}{18}=-110^\circ\); \(1{,}4\pi=252^\circ\).
4. 2.16. \(\frac{5\pi}{3}=300^\circ\); \(-\frac{\pi}{3}=-60^\circ\); \(0{,}4\pi=72^\circ\).
5. 2.17. \(\frac{19\pi}{36}=95^\circ\); \(-\frac{7\pi}{6}=-210^\circ\); \(1{,}1\pi=198^\circ\).
6. 2.18. \(\frac{\pi}{3}=60^\circ\); \(-\frac{13\pi}{18}=-130^\circ\); \(1{,}25\pi=225^\circ\).