Question

Ada yg bisa nomor 18 dgn caranya y. thanks.

Answer 1

8x karna itu siku siku jadi di kalikan 90
8x90= 720
720 : 60
= 12
semoga membantu

Answer 2

Segitiga ABC
t = AC = 8 m
Sudut B = 60 derajat
Sudut C = 90 derajat
Sudut A = 180 - (60+90) = 180-150 = 30 derajat
AB = ...?

sin B = hadap / miring
sin 60 = 8/x
1/2 √3 = 8/x
8/x = √3/2
x/8 = 2/√3
x = 2 /√3 X 8
x = 16/√3
x = 16/√3 X √3/√3
x = 16√3/3
x = 5,33√3
x = 5,33 X 1,73
x = 9,22
x = 9

Maaf, kalau salah.