Sin A / a = Sin B / b
Sin 120°/8 = Sin B/3
Cross multiply to get 3 • Sin 120° = 8 • Sin B
Sin 120° is (sqrt3 / 2)
3•(sqrt3 / 2) = 8 •sin B
3•sqrt3 / 2 = 8• sin B
(3•sqrt3 / 2)/8 = sin B
3•sqrt3 / 2 • 1/8 = sin B
3•sqrt3 / 16 = sin B
0.3247595264 = sin B
By using sin inverse we get m