document.write( "Question 1151363: prove or disprove with trig identities\r
\n" ); document.write( "\n" ); document.write( "2cos(x)=sin2(x)\r
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Algebra.Com's Answer #773109 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"2cos%28x%29=sin%5E2%28x%29\"=> it is \"not\" an identity\r
\n" ); document.write( "\n" ); document.write( "reason: using identity \"sin%5E2%28x%29%2Bcos%5E2%28x%29=1\"=>\"sin%5E2%28x%29=1-cos%5E2%28x%29\"
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