Answer
$\frac{\pi}{20}$
Work Step by Step
To convert from degrees to radians, multiply the angle by $\frac{\pi}{180}$:
$9\times\frac{\pi}{180}=\frac{\pi}{20}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.