document.write( "Question 891822: Hi please help me...What formula do I need to solve this trigonometric identity?
\n" ); document.write( "tan(x-y-z) knowing that: tan(x)={2- sqrt(3)};tan(y)={sqrt(3)}; tan(z)={2+sqrt(3)}... please help, I would be very grateful:!!
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Algebra.Com's Answer #540063 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
Wikipedia - half angle formulas
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