document.write( "Question 1070832: Find B for triangle ABC if a = 13.2 yards, b = 17.7 yards, and c = 5.50 yards. \n" ); document.write( "

Algebra.Com's Answer #685873 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use the law of cosines,
\n" ); document.write( " $\"b%5E2=a%5E2%2Bc%5E2-2ac%2Acos%28B%29\"$
\n" ); document.write( " $\"cos%28B%29=%28b%5E2-a%5E2-c%5E2%29%2F%282ac%29\"$
\n" ); document.write( " $\"cos%28B%29=%2817.7%5E2-13.2%5E2-5.5%5E2%29%2F%282%2813.2%29%285.5%29%29\"$ \n" ); document.write( "

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