Question

Por favor, Preciso pra já

Answer 1

Resposta:

Explicação passo-a-passo:

Usando a Lei dos Senos

$\frac{a}{sen60}=\frac{6}{sen45}\\\\\\\frac{a}{\frac{\sqrt{3}}{2}}=\frac{6}{\frac{\sqrt{2}}{2}}\\\\\frac{a\sqrt{2}}{2}=\frac{6\sqrt{3}}{2}\\\\a\sqrt{2}=6\sqrt{3}$

multiplicando ambos os membros por $\sqrt{2}$

$2a=6\sqrt{3}.\sqrt{2}\\\\a=\frac{6\sqrt{6}}{2}\\\\a=3\sqrt{6}\\\\a=3.2,44\\\\a=7,32$

Item d) 7,3