document.write( "Question 401382: Vertify is an identity
\n" ); document.write( "cos^2(2x)+4sin^2(x).cos^2(x)=1\r
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Algebra.Com's Answer #284044 by Tatiana_Stebko(1539) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%28cos%282x%29%29%5E2%2B4%28sinx%29%5E2%2A%28cosx%29%5E2=1\"$
\n" ); document.write( " $\"%28cos%282x%29%29%5E2%2B%282%2Asinx%2Acosx%29%5E2=1\"$
\n" ); document.write( "Use FORMULA $\"2%2Asinx%2Acosx=sin%282x%29\"$
\n" ); document.write( " $\"%28cos%282x%29%29%5E2%2B%28sin%282x%29%29%5E2=1\"$
\n" ); document.write( "Use FORMULA $\"%28sinx%29%5E2%2B%28cosx%29%5E2=1\"$ , so $\"%28sin%282x%29%29%5E2%2B%28cos%282x%29%29%5E2=1\"$
\n" ); document.write( " $\"1=1\"$
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