A-Level Further Maths B8-03 De Moivre’s Theorem: Using the Theorem Part 2

[jasonjebaraj]

Salutations sir, quick question, I thought De Moivre’s Theorem only works if the modulus or r=1. This I am gathering from B8-01 where at 2:20 you said let’s assume r=1 before proving De Moivre’s Theorem works for negative integers.

[ebanybolokoli]

Do you plan to cover the whole of further maths content including optional modules in the future?

[ELLIPTICALWR]

for the arg of question 2 how come its -inverse tan(2) and not just inverse tan(2) cause i dont know where the - in front of the tan comes from