document.write( "Question 1085918: please help me thank you. solve for the unknown part. 8^2=7^2+14^2-2(7)(14)cosA \n" ); document.write( "

Algebra.Com's Answer #700022 by math_helper(2461) $\"\"$ $\"About$

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$\"+8%5E2+=+7%5E2%2B14%5E2-2%287%29%2814%29cosA+\"$
\n" ); document.write( "Solving for A:
\n" ); document.write( " $\"+64+=+49+%2B+196+-+196cosA+\"$
\n" ); document.write( " $\"+-181+=+-196cosA+\"$
\n" ); document.write( " $\"+cosA+=+181%2F196+=+0.923469+\"$
\n" ); document.write( " $\"+A+=+cos%5E-1%280.923469%29+=+0.393769+\"$ radians (about 22.561 degrees) \n" ); document.write( "

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