Originally posted by: DrPizza
Heck, who'd have even believed something as simple as Cos(x) = x - x^3/3! + x^5/5! - x^7/7! + ...
if they hadn't learned how to prove that result in calculus.
Originally posted by: oboeguy
Originally posted by: DrPizza
Heck, who'd have even believed something as simple as Cos(x) = x - x^3/3! + x^5/5! - x^7/7! + ...
if they hadn't learned how to prove that result in calculus.
That's the expansion for sine, btw (I would know, I just gave a lab assignment to explore this with Maple). Remember, cosine is an even function so the above could not be true.
