document.write( "Question 1029364: Verify that the trigonometric equation is an identity:\r
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Algebra.Com's Answer #644477 by Alan3354(69443)\"\" \"About 
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Verify that the trigonometric equation is an identity:\r
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\n" ); document.write( "Multiply thru by sin(x)
\n" ); document.write( "1 - 2sin^2(x) = cos(2x) QED
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