document.write( "Question 882501: If \n" ); document.write( "

Algebra.Com's Answer #533009 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"cos%282A%29=cos%5E2%28A%29-sin%5E2%28A%29\"$
\n" ); document.write( " $\"sin%28A%29=8%2F17\"$
\n" ); document.write( " $\"sin%5E2%28A%29%2Bcos%5E2%28A%29=1\"$
\n" ); document.write( " $\"cos%5E2%28A%29=1-sin%5E2%28A%29\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"cos%282A%29=1-sin%5E2%28A%29-sin%5E2%28A%29\"$
\n" ); document.write( " $\"cos%282A%29=1-2sin%5E2%28A%29\"$
\n" ); document.write( " $\"cos%282A%29=1-2%288%2F17%29%5E2\"$
\n" ); document.write( " $\"cos%282A%29=1-128%2F289\"$
\n" ); document.write( " $\"cos%282A%29=%28289-128%29%2F289\"$
\n" ); document.write( " $\"cos%282A%29=%28161%29%2F289\"$ \n" ); document.write( "

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