https://wiki.math.ucr.edu/index.php?action=history&feed=atom&title=Sum_and_Difference_FormulasSum and Difference Formulas - Revision history2026-04-22T22:15:14ZRevision history for this page on the wikiMediaWiki 1.35.0https://wiki.math.ucr.edu/index.php?title=Sum_and_Difference_Formulas&diff=1156&oldid=prevMathAdmin: Created page with "<div class="noautonum">__TOC__</div> == Sum and Difference Formula for Cosine== Given two angles <math> \alpha \text{ and } \beta</math> we have the following formulas: ::<m..."2015-11-15T01:23:00Z<p>Created page with "<div class="noautonum">__TOC__</div> == Sum and Difference Formula for Cosine== Given two angles <math> \alpha \text{ and } \beta</math> we have the following formulas: ::<m..."</p>
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== Sum and Difference Formula for Cosine==<br />
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Given two angles <math> \alpha \text{ and } \beta</math> we have the following formulas:<br />
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::<math>\cos(\alpha + \beta) = \cos(\alpha)\cos(\beta) - \sin(\alpha)\sin(\beta)</math><br />
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::<math> \cos(\alpha - \beta) = \cos(\alpha)\cos(\beta) + \sin(\alpha)\sin(\beta)</math><br />
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==Sum and Difference Formula for Sine==<br />
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Given two angles <math> \alpha \text{ and } \beta</math> we have the following formulas:<br />
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::<math>\sin(\alpha + \beta) = \sin(\alpha)\cos(\beta) + \cos(\alpha)\sin(\beta)</math><br />
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::<math>\sin(\alpha - \beta) = \sin(\alpha)\cos(\beta) - \cos(\alpha)\sin(\beta)</math><br />
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