# A Special Case of the Sum of Two Cosines

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This Demonstration illustrates the formula .

Contributed by: Izidor Hafner (March 2011)

Open content licensed under CC BY-NC-SA

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"A Special Case of the Sum of Two Cosines"

http://demonstrations.wolfram.com/ASpecialCaseOfTheSumOfTwoCosines/

Wolfram Demonstrations Project

Published: March 7 2011