Algebra Examples

$\cos (\frac{4 π}{15}) \cos (\frac{π}{60}) + \sin (\frac{4 π}{15}) \sin (\frac{π}{60})$

Step 1

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$\cos (\frac{4 π}{15}) \cos (\frac{π}{60}) + \sin (\frac{4 π}{15}) \sin (\frac{π}{60})$