An inverse tangent identity a. Use derivatives to show
Chapter 3, Problem 79(choose chapter or problem)
An inverse tangent identity a. Use derivatives to show that tan-1 2 n2 and tan-1 (n + 1) - tan-1 (n - 1) differ by a constant. b. Prove that tan-1 2 n2 = tan-1 (n + 1) - tan-1 (n - 1). (Source: The College Mathematics Journal, 32, 4, Sep 2001)
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