document.write( "Question 964188: Verify the identity\r
\n" ); document.write( "\n" ); document.write( "3 cos^2 B − 3 sin^2 B = 6 cos^2 B − 3\r
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Algebra.Com's Answer #589075 by Alan3354(69443)\"\" \"About 
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Verify the identity\r
\n" ); document.write( "\n" ); document.write( "3 cos^2 B - 3 sin^2 B = 6 cos^2 B - 3
\n" ); document.write( "cos^2 B - sin^2 B = 2cos^2 B - 1
\n" ); document.write( "cos^2 = sin^2 + 2cos^2 - 1
\n" ); document.write( "cos^2 = sin^2 + cos^2 + cos^2 - 1
\n" ); document.write( "cos^2 = 1 + cos^2 - 1
\n" ); document.write( "cos^2 = cos^2
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\n" ); document.write( "If anyone wants to comment about working on one side only, pls post an example to show that it makes a difference.
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