To convert from degrees to radians, multiply by the conversion factor #(piquadcc( radians))/180^@#.

Here's the expression:

#color(white)=450^@#

#=450^@color(blue)(*(piquadcc( radians))/180^@)#

#=450^color(red)cancelcolor(blue)@color(blue)(*(piquadcc( radians))/180^color(red)cancelcolor(blue)@)#

#=450color(blue)(*(piquadcc( radians))/180)#

#=(450*piquadcc( radians))/180#

#=(color(red)cancelcolor(black)450^5*piquadcc( radians))/color(red)cancelcolor(black)180^2#

#=(5*piquadcc(radians))/2#

#=(5piquadcc(radians))/2#

Usually written as:

#=(5pi)/2quadcc(radians)#

That's the conversion. Hope this helped!