Вычисли

\(\sin\left( \alpha + \dfrac{\pi}3 \right)\) , если \(\cos\alpha=-\dfrac45\) и \(\alpha\in\left[ \pi;\dfrac{3\pi}2 \right]\)

1. \(-\dfrac{3+2\sqrt3}{10}\)
2. \(-\dfrac{3+4\sqrt3}{10}\)
3. \(-\dfrac{3+\sqrt3}{5}\)
4. \(-\dfrac{4+3\sqrt3}{5}\)

Ответ:[ ]