What is the sum of the mixed numbers 2 1/2 and 3 3/4 when written as improper fractions?
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Math question: In triangle ABC, angle A measures 60 degrees and angle B measures 80 degrees. If the angle bisector of angle C intersects AB at point D, what is the measure of angle ADC?
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What is the sin/cos value of the angle measuring 30 degrees on the unit circle chart?