Question

Sabendo que cotgx=3√7/7 no 3° quadrante calcule tgX

Answer 1

Se cotgx = b/a => tgx = a/b

$cotgx= \frac{3 \sqrt{7} }{7} \\ \\ tgx= \frac{7}{3 \sqrt{7} } = \frac{7 \sqrt{7} }{3.7} = \frac{ \sqrt{7} }{3}$