Question

Panjang AC= 12cm
sudut A = 60°
sudut B = 45°
berapa panjang sisi BC

Answer 1

AC/sinB = BC/sinA
(b/sinB = a/sinA)

12/sin45 = a/sin60
12/1/2√2 = a/1/2√3
12.1/2√3 = a.1/2√2
6√3 = 1/2 a√2
6√6 = 1/2 a.2
a = 6√6

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