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JEE Mains · Maths · STD 12 - 7.1 indefinite integral

જો \(\int \sqrt{\sec 2 x-1} d x=\alpha \log _e\left|\cos 2 x+\beta+\sqrt{\cos 2 x\left(1+\cos \frac{1}{\beta} x\right)}\right|+\) અચળ હોય,તો \(\beta-\alpha=..............\)

  1. A \(0.5\)
  2. B \(1\)
  3. C \(10\)
  4. D \(100\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(1\)

Step-by-step Solution

Detailed explanation

\(\int \sqrt{\sec 2 x-1} d x=\int \sqrt{\frac{1-\cos 2 x}{\cos 2 x}} d x\) \(=\sqrt{2} \int \frac{\sin x}{\sqrt{2 \cos ^2 x-1}} d x\) \(\text { put } \cos x=t \Rightarrow-\sin x d x=d t\) \(=-\sqrt{2} \int \frac{d t}{\sqrt{2 t^2-1}}\)…
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