Use the identity cos 2 x = cos 2x + sin 2 x to obtain a power

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Use the identity cos2 x = cos 2x + sin2 x to obtain a power series for cos2 x.

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Thomas Calculus Early Transcendentals

ISBN: 9780321884077

13th Edition

Authors: Joel R Hass, Christopher E Heil, Maurice D Weir

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