How many radians are in a full rotation around a circle, or 360°?

Given:-

A full rotation.

To find the correct radians.

So as we know full rotation means 360 degree.

Also we know,

So for getting 360 degree. we get,

So the required solution is,

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0