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21 March, 03:26

Use the Law of Sines. Find b to the nearest tenth. Triangle CBA line CB = 76, ∠A=44°, ∠B=45°, Line b is in between AC

a. 47.4 b. 77.4 c. 74.7 d. 37.3

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  1. 21 March, 07:02
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    b = 77.4 ⇒ answer (b)

    Step-by-step explanation:

    ∵ m∠A = 44°, m∠B = 45°, BC = 76

    By using sin Rule:

    ∵ AC/sinB = BC/sinA

    ∴ AC/sin45 = 76/sin44

    ∴ AC = (76 * sin45) : sin44 = 77.4

    ∵ AC = b

    ∴ b = 77.4 answer (b)
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