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Question of the day
In a right triangle ABC with right angle at C and AB = 14. D is a point on AC with AD = 5, and angle BAD = 30°. Which of the following is the length of the line segment BC?
cos (angle BAD) = BC/AB cos (30°) = BC / 14 1/2 = BC / 14 BC = 7
7
9
7*√(3)
√(171)
√(221)
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