JEE MATHEMATICS MCQ: INVERSE TRIGONOMETRY

1 Medium

1 of 1

Analyzing +4 | -1

Sum of infinite terms of the series

{\cot ^{ - 1}}\left( {{1^2} + \frac{3}{4}} \right) + {\cot ^{ - 1}}\left( {{2^2} + \frac{3}{4}} \right) + {\cot ^{ - 1}}\left( {{3^2} + \frac{3}{4}} \right) + ...

View answer and explanation

Correct option: B

{\tan ^{ - 1}}\left( 2 \right)

Option B (

{\tan ^{ - 1}}( 2 )

) is correct because the series telescopes to

{\tan ^{ - 1}}(n + \frac{1}{2}) - {\tan ^{ - 1}}(n - \frac{1}{2})

and sums to

{\tan ^{ - 1}}(2)

More Questions from INVERSE TRIGONOMETRY

Practice All Chapter MCQs →

\cos ^{-1}(\cos 12)-\sin ^{-1}(\sin 12)

\sin \left(2 \tan ^{-1}(1 / 3)\right)+

\cos \left(\tan ^{-1} 2 \sqrt{2}\right)

\cos ^ {-1}\left\{\frac{1}{\sqrt{2}}\left(\cos \frac{9 \pi}{10}-\sin \frac{9 \pi}{10}\right)\right\}=

\sin \left(\sin ^{-1} \frac{1}{5}+\cos ^{-1} x\right)=1

x

{x^2} + {y^2} + {z^2} = {r^2},

{\tan ^{ - 1}}\left( {\frac{{xy}}{{zr}}} \right) + {\tan ^{ - 1}}\left( {\frac{{yz}}{{xr}}} \right) + {\tan ^{ - 1}}\left( {\frac{{xz}}{{yr}}} \right)\;

2{\tan ^{ - 1}}\left( {\frac{1}{3}} \right) + {\tan ^{ - 1}}\left( {\frac{1}{7}} \right)