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1/2 = 6/AC
AC = 12
Sin α=
Sin = y / r --> y = 5, r = 6
x =
x =
x=
Cos = x / r
=
karena kuadran 2 jadi nilainya negatif
jadi cos = - ---- (C)
6. Sin A = BC/AC
Sin 30 =
=
AC = 2. 6 = 12 ----- (C)