Explain to someone who has forgotten the even-odd properties of sinusoidal functions how the addition and subtraction

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Explain to someone who has forgotten the even-odd properties of sinusoidal functions how the addition and subtraction formulas can determine this characteristic for f(x) = sin(x) and g(x) = cos(x).  

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Precalculus

ISBN: 9781938168345

1st Edition

Authors: Jay Abramson

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