document.write( "Question 671141: please help me prove (1+6tan^2x)(1-sin^2x)=1 \n" ); document.write( "
Algebra.Com's Answer #417312 by Alan3354(69443)\"\" \"About 
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please help me prove (1+6tan^2x)(1-sin^2x)=1
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\n" ); document.write( "It doesn't.
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