13$, what's $\cos(\alpha + \beta)$?
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Ref: R9740

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Given that $\sin \alpha = \tfrac{3}{5}$ and $\cos \beta = \tfrac{12}{13}$, prove that one possible value of $\cos(\alpha + \beta)$ is $\tfrac{33}{65}$ and find all the other possible values.

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Trigonometry: Compound Angles

If $\sin \alpha = 3/5, \cos \beta = 12/13$, what's $\cos(\alpha + \beta)$? Add to your resource collection Remove from your resource collection Add notes to this resource View your notes for this resource

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If $\sin \alpha = 3/5, \cos \beta = 12/13$, what's $\cos(\alpha + \beta)$?
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