document.write( "Question 1047852: simplify
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Algebra.Com's Answer #663437 by advanced_Learner(501)\"\" \"About 
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first choice is
\n" ); document.write( "(1-sin 2x)/(1+sin 2x)\r
\n" ); document.write( "\n" ); document.write( "\"%281-sin2x%29%2F%281%2Bsin2x%29\" =\"%281-tanx%29%5E2%2F%281%2Btanx%29%5E2\"\r
\n" ); document.write( "\n" ); document.write( "second choice is
\n" ); document.write( "(1-sin 2x)/(1-sin 2x)=\"1\"
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