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    Question

    In triangle ABC, if angle A = 30°, angle B = 60°, and

    side a = 10 cm, find side b.
    A 5√3 cm Correct Answer Incorrect Answer
    B 10√3 cm Correct Answer Incorrect Answer
    C 8 cm Correct Answer Incorrect Answer
    D 7.5 cm Correct Answer Incorrect Answer

    Solution

    Using the Law of Sines: a/sinA = b/sinB, hence b = a * (sinB/sinA). b = 10 * (sin60°/sin30°) = 10 * (√3/2)/(1/2) = 10√3 cm. Correct answer : b) 10√3 cm

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