document.write( "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. \n" ); document.write( "

Algebra.Com's Answer #607534 by Alan3354(69443) $\"\"$ $\"About$

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?
\n" ); document.write( "-------------
\n" ); document.write( "BC = side a
\n" ); document.write( "AB = side c
\n" ); document.write( "-----
\n" ); document.write( "Use the Law of Sines:
\n" ); document.write( "sin(C)/c = sin(A)/a
\n" ); document.write( " \n" ); document.write( "

\n" );