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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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• Practice
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## Cosine Sum and Difference Formulas Practice

by CK-12 //at grade
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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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