Equations > Trigonometry > Trigonometric Identities > Sum and Difference of Angles Identity - Cosine

Sum and Difference of Angles Identity - Cosine

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MathML Code:

 $\mathrm{cos}\left({\theta }_{1}±{\theta }_{2}\right)=\mathrm{cos}{\theta }_{1}\mathrm{cos}{\theta }_{2}\mp \mathrm{sin}{\theta }_{1}\mathrm{sin}{\theta }_{2}$

MathType 5.0: