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Homework Statement
It has been a while since I have really been involved in trig seriously, But I felt it appropriate to go in this particular forum because in my classes from years back "precal" was the title associated with trig (:
The Problem:
sin(X) / sin(X/2) ----->Somehow simplifies into-----> 2*cos(x/2)
I realize this is probably a basic skill I should have, but until this problem I have never really had issues with any of the math in my physics classes, But perhaps I am just looking in the wrong places for the "How" of this situation.
Homework Equations
I am 100% sure of the accuracy of this relation, since it was derived from wolfram and then used to answer a refraction physics question which came back correct. I would just like to know where I can look so I can learn how this simplification is possible that I may do this on my own without help.
Thanks!
The Attempt at a Solution
I tried looking at relevant trig Identities...but none of them seem to apply here..seems there is some *tricky* stuff here as my calculus teachers always said haha d: