Question

Alguem sabe me dizer se o calculo da QUESTAO 2 ta certo??

Answer 1

Tg = 30º = $\dfrac{ \sqrt{3}}{3}$

$\dfrac{ \sqrt{3}}{3} = \dfrac{18}{x} \\ \\ x \sqrt{3} = 18 * 3 \\ \\ x \sqrt{3} = 54 \\ \\ \\ x = \dfrac{54}{ \sqrt{3}} \\ \\ \\ x = \dfrac{54 \sqrt{3}}{ \sqrt{3} * \sqrt{3} } \\ \\ \\ x = x = \dfrac{54 \sqrt{3}}{ (\sqrt{3})^2 } \\ \\ \\ x = \dfrac{54 \sqrt{3}}{3} \\ \\ \\ => x = 18 \sqrt{3}$