document.write( "Question 1156149: using the law of cosines, solve for zy\r
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Algebra.Com's Answer #778833 by Alan3354(69443)\"\" \"About 
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using the law of cosines, solve for zy\r
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\n" ); document.write( "Good idea.
\n" ); document.write( "\"c%5E2+=+a%5E2+%2B+b%5E2+-+2%2Aa%2Ab%2Acos%28C%29\" where C is the angle between sides a & b.
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