Establish identity. cos( + ) + cos( - ) = 2 cos cos

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Establish identity.

cos(α + β) + cos(α - β) = 2 cos α cos β

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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Question Posted: Mar 09, 2019 07:58 AM

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Establish identity. cos( + ) + cos( - ) = 2 cos cos

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Precalculus

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