Question

Dados sen x = −3/4 e cos x = −
-7/4, com π < x < 3π/2, calcule tg(x).

Answer 1

$tg = \frac{senx}{cosx} \\ \frac{-3}{4} . \frac{-4}{7} \\ \frac{12}{28} \\ tg x = \frac{3}{7}$

Answer 2

Fórmula da tg(x) = senx/cosx
 tg(x) = -3/4 / -7/4
tg(x) = -3.4/4.-7
tg(x) = -12/-28
tg(x) = 3/7