Вычислите: \(\sin{\frac{2\pi}{5}}\cdot\cos{\frac{\pi}{15}}-\cos{\frac{2\pi}{5}}\cdot\sin{\frac{\pi}{15}}\)

• \(\frac{\sqrt3}{2}\)
• \(\frac{\sqrt2}{2}\)
• \(\frac{1}{2}\)
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