Вычислите \(sin\alpha,\) если \(cos\alpha=\frac{3}{5}, \frac{3\pi}{2}\lt \alpha\lt 2\pi.\)

• \(-\frac{4}{5}\)
• \(\frac{4}{5}\)
• \(-\frac{3}{5}\)
• \(\frac{3}{5}\)