document.write( "Question 445435: tan(15)/1-tan^2(15) \n" ); document.write( "
Algebra.Com's Answer #307255 by robertb(5830)\"\" \"About 
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\"tan%2815%29%2F%281-tan%5E2%2815%29%29+=+%281%2F2%29tan%2830%29+=+2%2Fsqrt%283%29\" \n" ); document.write( "
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