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CBSE XII
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Math
Solve for x : \[ tan^{-1}\frac{1-x}{1+x}=\frac{1}{2}tan^{-1}x:x > 0.\]
cbse
class12
modelpaper
2012
sec-a
q2
math
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asked
Feb 15, 2013
by
thanvigandhi_1
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