Precalculus Archive: Questions from November 17, 2022
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2 answers
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Verify the identities
5. Verifique las siguientes identidades. (a) \( \frac{\cos (\alpha+\beta)}{\cos \alpha \cos \beta}=1-\tan (\alpha) \tan (\beta) \) (b) \( \operatorname{sen}(\alpha-\beta) \operatorname{sen}(\alpha+\be2 answers -
Find the exact value using the sum or subtraction formulas
1. Halle los valores exactos usando las fórmulas de suma o resta (a) \( \cos \left(105^{\circ}\right) \) (b) \( \operatorname{sen}\left(\frac{11 \pi}{12}\right) \) (c) \( \tan \left(-\frac{\pi}{12}\r2 answers