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AP EAMCET · Maths · Indefinite Integration

\(\int \frac{\sin x+\cos x}{\sin x-\cos x} d x=\)

  1. A \(-x+\log |\cos x-\sin x|+c\)
  2. B \(x-\log |\cos x-\sin x|+c\)
  3. C \(-\log |\cos x-\sin x|+c\)
  4. D \(\log |\cos x-\sin x|+c\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\log |\cos x-\sin x|+c\)

Step-by-step Solution

Detailed explanation

Let \(u = \sin x - \cos x\). \(du = (\cos x - (-\sin x)) dx = (\cos x + \sin x) dx\). \(\int \frac{1}{u} du\). \(=\log |u| + C\). \(=\log |\sin x - \cos x| + C\). \(=\log |\cos x - \sin x| + C\).