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Home  >>  CBSE XII  >>  Math  >>  Model Papers
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Find x if \( tan^{-1} 4 + cot^{-1}x =\large \frac{\pi}{2} \)

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x=4,because \[tan^{-1}x+cot^{-1}x=\frac{\pi}{2}\]
answered Feb 16, 2013 by rvidyagovindarajan_1
 
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