document.write( "Question 1086276: I need to simplify 2cos^2(θ/3)-1 using a double-angle formula. I really can't figure it out, thank you! \n" ); document.write( "

Algebra.Com's Answer #700437 by Edwin McCravy(20062) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The double angle formula to use is this one\r\n" );
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document.write( "We substitute  for \r\n" );
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document.write( "The right side of that equation is what we're given,\r\n" );
document.write( "so the answer is the left side:\r\n" );
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document.write( "which can be also be written as\r\n" );
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document.write( "        or\r\n" );
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document.write( "Edwin

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