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

यदि श्रेणी \(\tan ^{-1}\left(\frac{1}{3}\right)+\tan ^{-1}\left(\frac{1}{7}\right)+\tan ^{-1}\left(\frac{1}{13}\right)+\tan ^{-1}\left(\frac{1}{21}\right)+\ldots \text {, }\) के प्रथम \(10\) पदों का योग \(S\) है, तो \(\tan ( S )\) बराबर है 

  1. A \(\frac{5}{11}\)
  2. B \(-\frac{6}{5}\)
  3. C \(\frac{10}{11}\)
  4. D \(\frac{5}{6}\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\frac{5}{6}\)

Step-by-step Solution

Detailed explanation

\(S=\tan ^{-1}\left(\frac{1}{3}\right)+\tan ^{-1}\left(\frac{1}{7}\right)+\tan ^{-1}\left(\frac{1}{13}\right)+\ldots\) \(S=\tan ^{-1}\left(\frac{2-1}{1+1.2}\right)+\tan ^{-1}\left(\frac{3-2}{1+2 \times 3}\right)+\tan ^{-1}\)…
Same subject
Explore more questions on app
From JEE Mains
Explore more questions on app