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| Math Central | Quandaries & Queries |
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Question from JOHN, a student: find the exact value of tan15° in surd form. |
Hi John,
Try using the multiple angle formula for the tangent
\[\tan(a + b) = \frac{\tan(a) + tan(b)}{1 - \tan(a) \tan(b)}.\]
Write back if you need more assistance,
Penny
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