Ответ:
\(\theta_{рад}=\theta_{град}\cdot\frac{\pi}{180^\circ}\).
\(30^\circ=\frac\pi6\), \(45^\circ=\frac\pi4\), \(60^\circ=\frac\pi3\), \(90^\circ=\frac\pi2\), \(120^\circ=\frac{2\pi}3\), \(-135^\circ=-\frac{3\pi}4\), \(-300^\circ=-\frac{5\pi}3\).
\(\theta_{рад}=\theta_{град}\cdot\frac{\pi}{180^\circ}\).
\(30^\circ=\frac\pi6\), \(45^\circ=\frac\pi4\), \(60^\circ=\frac\pi3\), \(90^\circ=\frac\pi2\), \(120^\circ=\frac{2\pi}3\), \(-135^\circ=-\frac{3\pi}4\), \(-300^\circ=-\frac{5\pi}3\).