document.write( "Question 600726: hello tutors i really need help with this problem.\r
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\n" ); document.write( "\n" ); document.write( "what is the expression of tan (-220) is equivalent to ?
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Algebra.Com's Answer #379459 by Alan3354(69443)\"\" \"About 
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what is the expression of tan (-220) is equivalent to ?
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\n" ); document.write( "Add 360 --> 140 degs
\n" ); document.write( "tan(140) =~ -0.8390996
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