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

\(\tan ^{-1}( x +1)+\cot ^{-1}\left(\frac{1}{ x -1}\right)=\tan ^{-1}\left(\frac{8}{31}\right)\) के लिए \(x\) के संभव मानों का योगफल है :

  1. A \(-\frac{32}{4}\)
  2. B \(-\frac{31}{4}\)
  3. C \(-\frac{30}{4}\)
  4. D \(-\frac{33}{4}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(-\frac{32}{4}\)

Step-by-step Solution

Detailed explanation

\(\tan ^{-1}(x+1)+\cot ^{-1}\left(\frac{1}{x-1}\right)=\tan ^{-1} \frac{8}{31}\) Taking tangent both sides :- \(\frac{(x+1)+(x-1)}{1-\left(x^{2}-1\right)}=\frac{8}{31}\) \(\Rightarrow \frac{2 x}{2-x^{2}}=\frac{8}{31}\) \(\Rightarrow 4 x^{2}+31 x-8=0\)…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app