Do you have the second page of le volumes/recursion sheet? I'm curious to see the question that goes with that answer.shafqat said:De Moivre, volumes, recursion
6. a) 10! (pi^10 / 10! – pi^8/8! + pi^6/6! – pi^4/4! + pi^2/2! – 2)
Sure thing.KFunk said:Do you have the second page of le volumes/recursion sheet? I'm curious to see the question that goes with that answer.
3c)to prove: w+w²+w³+...+w^8=-1LaCe said:With De Moivres, could I get some answers for question 3 d) and e), just want to check.
3.c) since w^k is a solution of z^9-1=0
(z-1)(w^8+w^7+...+w+1)=0
since z cannot equal 1
w^8+....+w=-1
EDIT: wait, i have done this question before, it takes a while, does anyone have a quick method for this or do u just have to grind it out with trig?