Question

calcule o valor de x em cada triângulo.

Answer 1

c)

cos 30 = (3$\sqrt{3}$)/x

x = (3$\sqrt{3}$)/cos 30

x = (3$\sqrt{3}$) / ($\sqrt{3}$)/2

x = (6$\sqrt{3}$) / ($\sqrt{3}$)

x = 6

d)

cos 45 = x/2$\sqrt{2}$

x = cos 45 * 2$\sqrt{2}$

x = $\sqrt{2}$/2 * 2$\sqrt{2}$

x = $\sqrt{2}$ * $\sqrt{2}$

x = 2

e) tg 30 = x/2,5

x = tg 30 / 2,5

x = $\sqrt{3}$ / 2,5

2,5 é igual a 25/10 Então

x = (10$\sqrt{3}$)/25

x = (2$\sqrt{3}$)/5

f) tg 45 = 3,8/x

x = 3,8/tg 45

x = 3,8/1

x = 3,8