document.write( "Question 1085306: Simplify the expression by using a double-angle formula.
\n" ); document.write( "2cos^2 4theta -1
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Algebra.Com's Answer #699390 by ikleyn(52872) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Double angle formula for cosines is   = .\r\n" );
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document.write( "Use it, and you will get\r\n" );
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document.write( " = .\r\n" );
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