- #1
scottshannon
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Homework Statement
Actually I have the problem solved but I do not understand how the numerator becomes equal to the denominator in the 3rd step.
Homework Equations
I have been looking for an identity for arctan but can't find one that seems to match.
The Attempt at a Solution
My attempt has been to derive a trig identity for arctan (A/B). I found this: arctan[(A+B)/(1−AB)]=arctanA+arctanB