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JEE Mains · Maths · STD 12 - 7.1 indefinite integral

If \(\int \frac{\sin ^{\frac{3}{2}} x+\cos ^{\frac{3}{2}} x}{\sqrt{\sin ^3 x \cos ^3 x \sin (x-\theta)}} d x=A \sqrt{\cos \theta \tan x-\sin \theta}+B \sqrt{\cos \theta-\sin \theta \operatorname{coc} x}+C,\) where \(C\) is the integration constant, then \(A B\) is equal to

  1. A  \(4 \operatorname{cosec}(2 \theta)\)
  2. B  \(4 \sec \theta\)
  3. C  \(2 \sec \theta\)
  4. D \(8 \operatorname{cosec}(2 \theta)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(8 \operatorname{cosec}(2 \theta)\)

Step-by-step Solution

Detailed explanation

\( \text { Sol. } \int \frac{\sin ^{\frac{3}{2}} x+\cos ^{\frac{3}{2}} x}{\sqrt{\sin ^3 x \cos ^3 x \sin (x-\theta)}} d x \) \( I=\int \frac{\sin ^{\frac{3}{2}} x+\cos ^{\frac{3}{2}} x}{\sqrt{\sin ^3 x \cos ^3 x(\sin x \cos \theta-\cos x \sin \theta)}} d x \)…