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JEE Mains · Maths · STD 12 - 2. inverse trigonometric function

જો \(f(x)\, = \,2\,{\tan ^{ - 1}}\,x\, + \,{\sin ^{ - 1}}\,\left( {\frac{{2x}}{{1 + {x^2}}}} \right),x > 1\,\) તો \(f\,(5)\) મેળવો. 

  1. A \(\,{\tan ^{ - 1}}\left( {\frac{{65}}{{156}}} \right)\)
  2. B \(\frac {\pi }{2}\)
  3. C \(\pi \)
  4. D \(\,4\,\,{\tan ^{ - 1}}(5)\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\pi \)

Step-by-step Solution

Detailed explanation

\(f\left( x \right) = 2{\tan ^{ - 1}}x + {\sin ^{ - 1}}\left( {\frac{{2x}}{{1 + {x^2}}}} \right)\) \( \Rightarrow f\left( x \right) = 2{\tan ^{ - 1}}x + \pi - 2{\tan ^{ - 1}}x\) \( \Rightarrow f\left( x \right) = \pi \) \( \Rightarrow f\left( 5 \right) = \pi \)
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