Question

найти sin a, tg a, если cos a = -0.6

Answer 1

$\sin( \alpha ) = \sqrt{ 1 - { \cos}^{2} \alpha } = 0.8 \\ \tan( \alpha ) = \frac{ \sin( \alpha ) }{ \cos( \alpha ) } = - \frac{0.8}{0.6} = - 1.33$