Trigonometry Examples

$\sin (\frac{13 π}{28}) \cos (\frac{2 π}{7}) + \cos (\frac{13 π}{28}) \sin (\frac{2 π}{7})$

Step 1

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$\sin (\frac{13 π}{28}) \cos (\frac{2 π}{7}) + \cos (\frac{13 π}{28}) \sin (\frac{2 π}{7})$