Question

Encontre o valor de x.

Answer 1

Resposta:

$\cos(45 {}^{o} ) = \frac{x}{4} \\ \\ \frac{ \sqrt{2} }{2} = \frac{x}{4} \\ \\ 2x = 4 \sqrt{2} \\ \\ x = \frac{4 \sqrt{2} }{2} \\ \\ x = 2 \sqrt{2} cm$

Bons Estudos!