Is it true that tan (tan -1 x) = x for all x? Is it true that

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Is it true that tan (tan-1 x) = x for all x? Is it true that tan-1 (tan x) = x for all x?

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Calculus Early Transcendentals

ISBN: 978-0321947345

2nd edition

Authors: William L. Briggs, Lyle Cochran, Bernard Gillett

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