ANSWER:
[tex]-\frac{1}{3}\pi[/tex]
STEP-BY-STEP EXPLANATION:
Degrees and radians are two different systems for measuring angles. An angle of 360 ° equals 2π radians; an angle of 180 ° equals π radians.
Therefore the formula is the following:
[tex]x\cdot\frac{\pi}{180}=-60\cdot\frac{\pi}{180}=-\frac{1}{3}\pi[/tex]
