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AP EAMCET · Maths · Indefinite Integration

If \(\mathrm{I}_{\mathrm{n}}=\int_0^{\frac{\pi}{4}} \tan ^n x d x\), then \(\mathrm{I}_{13}+\mathrm{I}_{11}=\)

  1. A \(\frac{1}{13}\)
  2. B \(\frac{1}{12}\)
  3. C \(\frac{1}{10}\)
  4. D \(\frac{1}{11}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\frac{1}{12}\)

Step-by-step Solution

Detailed explanation

Given, \(I_n=\int_0^{\pi / 4} \tan ^n x d x\) and \(I_{n+1}=\int_0^{\pi / 4} \tan ^{n+1} x d x \quad(n \rightarrow n+1)\) \(I_{n-1}=\int_0^{\pi / 4} \tan ^{n-1} x d x \quad(n \rightarrow n-1)\) Since, we know…