Need to solve DeMoivre Theorem using the TiNspire CX Step by Step ?
Just enter a complex number in the format (a+bi)^n and lean back to observe the magic :
PreCalculus Made Easy is the app to have when doing DeMoivre Formula – download it here https://www.tinspireapps.com/?a=pme
PS: Roots of Unity can be computed too using this app