Question

preciso da resposta urgente​

Answer 1

Explicação passo-a-passo:

a) sen60° =

$\sin(60) = \frac{ \sqrt{3} }{3} = \frac{y}{9} \\ 3y = 9 \sqrt{3} \\ y = 3 \sqrt{3} \\ \\ \cos(60) = \frac{1}{2} = \frac{x}{9} \\ 2x = 9 \\ x = 4.5 \: ou \: \frac{9}{2}$

b)

$\sin(30) = \frac{1}{2} = \frac{h}{12} \\ 2h = 24 \\ h = 12 \\ \\ \cos(30) = \frac{ \sqrt{3} }{3} = \frac{z}{12} \\ 3z = 12 \sqrt{3} \\ z = 4 \sqrt{3}$