The Degrees package provides some "wrapper" commands that process degrees-based trig functions into their radians-based form before calling the main library command of the same name.  The result is then processed back into degrees form.  

These functions are part of the Degrees package, so they can be used in the short form, for example expand(..), only after executing the command with(Degrees). However, they can always be accessed through the long form of the command by using for example Degrees:-expand(..).

$\mathrm{with}\left(\mathrm{Degrees}\right)\:$

$\mathrm{int}\left(\mathrm{sind}\left(x\right)\,x\right)$

$-\mathrm{cosd}\left(x\right)$

$\mathrm{expand}\left(\mathrm{sind}\left(x+y\right)\right)$

$\mathrm{sind}\left(x\right)\mathrm{cosd}\left(y\right)+\mathrm{cosd}\left(x\right)\mathrm{sind}\left(y\right)$

The Degrees[expand], Degrees[int], Degrees[diff], Degrees[solve] and Degrees[trigsubs] commands were introduced in Maple 2021.

For more information on Maple 2021 changes, see Updates in Maple 2021.