document.write( "Question 19980: i want to know all the formulas of cos \n" ); document.write( "
Algebra.Com's Answer #9642 by Paul(988)\"\" \"About 
You can put this solution on YOUR website!
cos = opposite/adjacent\r
\n" ); document.write( "\n" ); document.write( "Laws of cos = \"c%5E2=a%5E2%2Bb%5E2-2abcos%28gamma%29\"
\n" ); document.write( " \"a%5E2=c%5E2%2Bb%5E2-2cbcos%28alpha%29\"
\n" ); document.write( " \"b%5E2=c%5E2%2Ba%5E2-2cacos%28beta%29\"
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