Question

calcule o valor de x e y

Answer 1

a)
$sen45 = \sqrt{2} \div 2$
$y \div 20 \sqrt{2} = \sqrt{2} \div 2$
$2y = \sqrt{2} \times \sqrt{2} \times 20$
y=20
$cos45 = \sqrt{2} \div 2$

Logo é X igual a Y