The value of \tan ^{-1} \left (\dfrac{1}{3}\right) +\tan ^{-1} \le | Filo
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Math

Calculus

Inverse Trigonometric Functions

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The value of \tan ^{-1} \left (\dfrac{1}{3}\right) +\tan ^{-1} \left (\dfrac{2}{9}\right) + \tan ^{-1}\left  (\dfrac{4}{33}\right) + \tan ^{-1} \left (\dfrac{8}{129}\right) +....... terms is

Correct Answer: Option(a)
Solution: terms.


we know that



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