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7 September, 03:38

Use the Law of Sines. Find b to the nearest tenth. a. 45.0 b. 81.4 c. 65.4 d. 90.4 Triangle CBA Line CB is 73 ∠B = 56°, ∠A=48°, b is a line between AC

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  1. 7 September, 07:30
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    b = 81.4 ⇒ answer (b)

    Step-by-step explanation:

    ∵ In ΔABC

    ∵ CB = 73, m∠B = 56°, m∠A = 48°

    ∵ AC = b

    By using sin Rule:

    ∵ b/sinB = BC/sinA

    ∴ b/sin56 = 73/sin48

    ∴ b = (73 * sin56) : sin48 = 81.4 ⇒ answer (b)
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