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Prove the following : $ \tan^{-1}\large\frac{1}{3}$$ + \tan^{-1}\large\frac{1}{5}$$+ \tan^{-1}\large\frac{1}{7}$$+\tan^{-1}\large\frac{1}{8} = \frac{\pi}{4} $
cbse
class12
modelpaper
2008-1
sec-b
q12
math
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asked
Dec 20, 2012
by
thanvigandhi_1
edited
Jul 15, 2013
by
sreemathi.v
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