Question

Rewrite -54 degrees in radians as a mulitple of pi?

Answer 1

rad = (degree) pi/180 use this formula.

Answer 2

There are 2 pi radians in a full circle, or 360 deg.
That means there are pi radians in 180 degrees.

\(\pi ~rad = 180^o\)

\(1~rad = \dfrac{180^o}{\pi} \)

Find what fraction of 180 deg -54 deg is, and tehn just replace 180 deg with pi radians.