Prove that this is true for every n. (n is an element of natural numbers)
cos(n*pi) = (-1)^n
I would very much appreciate your help, thank you.
Last edited by jakobjakob; Oct 29th 2012 at 12:25 PM.
Follow Math Help Forum on Facebook and Google+
Last edited by johnsomeone; Oct 29th 2012 at 12:33 PM.
Thank you for your help.
View Tag Cloud