Question

Calcule o valor de y no triângulo abaixo​

Answer 1

Explicação passo-a-passo:

1)

$\frac{y}{12} =sen30\\\\\frac{y}{12}=\frac{1}{2}\\ \\2y=12\\\\y=6$

2)

$\frac{x}{80} =sen45\\\\\frac{x}{80}=\frac{\sqrt{2} }{2} \\\\\frac{x}{80}=\frac{1,41}{2}\\\\2x=80.(1,41)\\\\2x=112,8\\\\x=56,4m$