A radian is defined as follows.

$360^{\circ} = 2 \pi$ radians.

Dividing both sides by $2\pi$, one radian is:

$\frac{180}{\pi}^{\circ} = 1$ radian.

Christina Daniel

I am a research assistant in theoretical physics. This website, derive-it.com, serves to organize my ongoing learning and research as well as to provide a resource to other learners.