Найдите \(\displaystyle \sin\color{red}{\alpha}\) и \(\displaystyle \cos\color{red}{\alpha}\small,\) если \(\displaystyle \tg\color{red}{\alpha}=-2{,}4\) и \(\displaystyle 90º<\color{red}{\alpha}<180º\small.\)

\(\displaystyle \cos\color{red}{\alpha}=\)[ ]  и \(\displaystyle \sin\color{red}{\alpha}=\)[ ]