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# Cosine Sum and Difference Formulas

## Cosine of a sum or difference related to a set of cosine and sine functions.

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## Cosine Sum and Difference Formulas

by CK-12 //at grade
Derivation of the cosine sum and difference formulas
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• Video

## Sum and Difference Identities for Cosine

by CK-12 //at grade
Uses the sum and difference cosine identities to determine values of functions.
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• Study Guide

## Trigonometric Sum and Difference Formulas

by Edgar Magana //at grade
This study covers the concepts of the sum and difference functions of both sine, cosine, and tangent.
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