Expand Using Sum/Difference Formulas sin((2pi)/5)cos((4pi)/15)+cos((2pi)/5)sin((4pi)/15)

$\sin (\frac{2 π}{5}) \cos (\frac{4 π}{15}) + \cos (\frac{2 π}{5}) \sin (\frac{4 π}{15})$

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$\sin (\frac{2 π}{5}) \cos (\frac{4 π}{15}) + \cos (\frac{2 π}{5}) \sin (\frac{4 π}{15})$