Arc Again And Tangent Again!
Geometry
Level
2
\[\arctan \dfrac{1}{3} + \arctan \dfrac{1}{4}+\arctan \dfrac{1}{5}+\arctan \dfrac{1}{n} = \dfrac{\pi}{4} \]
Find the positive integer \(n\) such that the above equality is true.
by
Anish Harsha