If sin x = 1/3 and sec y = 5/4 , where x and y lie between

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If sin x = 1/3 and sec y = 5/4 , where x and y lie between 0 and π/2, evaluate the expression.

cos(x + y)

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Calculus Early Transcendentals

ISBN: 9781337613927

9th Edition

Authors: James Stewart, Daniel K. Clegg, Saleem Watson, Lothar Redlin

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