Найдите \(\displaystyle \tg\color{red}{\alpha}\small,\) если \(\displaystyle \sin\color{red}{\alpha}=\frac{12}{13}\) и \(\displaystyle 90º\lt \color{red}{\alpha}\lt 180º\small.\)

\(\displaystyle \tg\color{red}{\alpha}=\)[ ]