Recent content by embassyhill

Ok so everything but 1/1 and -1/(2n+1) cancel each other out. Now I get this exercise but what about the bigger question? Are there any tricks to learn here (about the sigma) or is it just about using your knowledge of algebra?

Homework Statement Homework Equations The Attempt at a Solution Obviously I don't need a solution because it's right there. What I need to understand is what happened after the third equation sign and more importantly, how would I learn to solve these kinds of problems on my own. I looked at...

I did manage to get cos(alpha-beta)+isin(alpha-beta) on the upper part but I was too dumb to remember cos^2+sin^2=1 :P. Thanks.

This is supposed to be a proof of trigonometric multiplication of complex numbers: What happened at the =...= point? I understand everything up to that.

I'm a CS student interested in learning vehicle dynamics to program a simulator (like iRacing for example). I know this is a difficult task but I am willing to take the long road. So I am asking here, what math and physics subjects should I go through to make this happen? I guess it's probably...