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
Algebra ->
Triangles
-> 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
Log On
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?
-------------
BC = side a
AB = side c
-----
Use the Law of Sines:
sin(C)/c = sin(A)/a
