(a) Show that tan 1 2 x cot 1 2 x 2 2 cot x. (b) Find the
Chapter , Problem 3(choose chapter or problem)
(a) Show that tan 1 2 x cot 1 2 x 2 2 cot x. (b) Find the sum of the series o ` n1 1 2n tan x 2n
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