Question 304230
The relation that you need is
{{{360 = 2*pi}}}
This converts degrees to radians
You have 45 degrees
In order to convert the units to radians, you need
(degrees)*(radians/degrees)
The degrees cancel and you're left with radians
{{{45}}} degrees x {{{2*pi/360}}} radians/degrees = {{{90*pi/360}}}
{{{90*pi/360 = pi/4}}}