Question

Calcule a distância de A ate B na figura abaixo.

Answer 1

$\cos(30) = \frac{x}{18} \\ \frac{ \sqrt{3} }{2} = \frac{x}{18} \\ x = 9 \sqrt{3}$

$\tan(60) = \frac{30}{y} \\ \sqrt{3} = \frac{30}{y} \\ y = 10 \sqrt{3}$

$x + y = 9 \sqrt{3} + 10 \sqrt{3} \\ x + y = 19 \sqrt{3}$

alternativa D