Выразите в градусах: а) π/6; б) π/3; в) 2π/3; г) π/4; д) 3π/4; е) 5π/6.

Для перевода из радиан в градусы нужно заменить $\pi$ на $180^{\circ}$ и выполнить деление. **7.3.** а) $\frac{\pi}{6} = \frac{180^{\circ}}{6} = 30^{\circ}$ б) $\frac{\pi}{3} = \frac{180^{\circ}}{3} = 60^{\circ}$ в) $\frac{2\pi}{3} = \frac{2 \cdot 180^{\circ}}{3} = 2 \cdot 60^{\circ} = 120^{\circ}$ г) $\frac{\pi}{4} = \frac{180^{\circ}}{4} = 45^{\circ}$ д) $\frac{3\pi}{4} = \frac{3 \cdot 180^{\circ}}{4} = 3 \cdot 45^{\circ} = 135^{\circ}$ е) $\frac{5\pi}{6} = \frac{5 \cdot 180^{\circ}}{6} = 5 \cdot 30^{\circ} = 150^{\circ}$ **7.4.** а) $\frac{7\pi}{8} = \frac{7 \cdot 180^{\circ}}{8} = \frac{7 \cdot 45^{\circ}}{2} = \frac{315^{\circ}}{2} = 157,5^{\circ}$ б) $\frac{8\pi}{9} = \frac{8 \cdot 180^{\circ}}{9} = 8 \cdot 20^{\circ} = 160^{\circ}$ в) $\frac{7\pi}{12} = \frac{7 \cdot 180^{\circ}}{12} = 7 \cdot 15^{\circ} = 105^{\circ}$ г) $\frac{5\pi}{12} = \frac{5 \cdot 180^{\circ}}{12} = 5 \cdot 15^{\circ} = 75^{\circ}$ д) $\frac{23\pi}{18} = \frac{23 \cdot 180^{\circ}}{18} = 23 \cdot 10^{\circ} = 230^{\circ}$ е) $\frac{25\pi}{18} = \frac{25 \cdot 180^{\circ}}{18} = 25 \cdot 10^{\circ} = 250^{\circ}$