Use the trigonometric identity cos 2 x + sin 2 x = 1 to prove that Begin

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Use the trigonometric identity cos2 x + sin2 x = 1 to prove that - 1 = 0. cos x lim Begin by multiplying the numerator and denominator by cos x + 1.

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Calculus Early Transcendentals

ISBN: 978-0321947345

2nd edition

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

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