Tolong banget ya kan
Jawaban:
4.
Sin 30⁰ = CD / AC
1/2 = 6 / A
AC = 6 / ½
AC = 12
Tan 30⁰ = CB / AC
⅓√3 = CB / 12
CB = ⅓√3 x 12
CB = 4√3
AB = √(AC² + CB²)
AB = √(12² + (4√3)²)
AB =√(144 + 16x3)
AB = √192
AB = 8√3
Luas = ½ x 8√3 x 6 = 24√3
5.
Sin 45⁰ = BC / √72
½√2 = BC / 6√2
BC = ½√2 x 6√2
BC = 6
sin 30⁰ = BC / AC
½ = 6 /AC
AC = 6 / ½
AC = 12
