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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