What is the dot product of two vectors given as (3, 2) and (-1, 4)?
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What is the value of angle A in a triangle with sides of length 5, 9, and 12, using the Sine Law?
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Math question: Given triangle ABC, where angle BAC measures 60° and the angle bisector of angle BAC intersects side BC at point D, if AC = 8 cm and AD = 4 cm, find the length of BD.