SOLUTION: In a triangle ABC, the length of side BC is 21.5, the length of side AB is 10.9, and the angle at C is 18.9 degrees. In degrees, and to 2 decimal places, what is the angle at A? D

Question 986752: In a triangle ABC, the length of side BC is 21.5, the length of side AB is 10.9, and the angle at C is 18.9 degrees. In degrees, and to 2 decimal places, what is the angle at A? Do not give any units in your answer. Your answer must be between 0 and 90.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
In a triangle ABC, the length of side BC is 21.5, the length of side AB is 10.9, and the angle at C is 18.9 degrees. In degrees, and to 2 decimal places, what is the angle at A?
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BC = side a
AB = side c
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Use the Law of Sines:
sin(C)/c = sin(A)/a

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