Asked by goto
prove that arctan3+2arctan2=pi+arccot3
Answers
Answered by
oobleck
as usual, google is a good place to start if you get stumped.
You can start here, and there are other proofs as well.
https://math.stackexchange.com/questions/272208/proving-arctan1-arctan2-arctan3-pi
You can start here, and there are other proofs as well.
https://math.stackexchange.com/questions/272208/proving-arctan1-arctan2-arctan3-pi
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