ExamBro
ExamBro
MHT CET · Maths · Definite Integration

\(\int_0^{\frac{\pi}{4}} \frac{\cos ^2 x \sin ^2 x}{\left(\cos ^3 x+\sin ^3 x\right)^2} \mathrm{~d} x=\)

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

Answer & Solution

Correct Answer

(C) \(\frac{1}{6}\)

Step-by-step Solution

Detailed explanation

\(\int_0^{\frac{\pi}{4}} \frac{\cos ^2 x \sin ^2 x}{\left(\cos ^3 x+\sin ^3 x\right)^2} \mathrm{~d} x = \int_0^{\frac{\pi}{4}} \frac{\tan^2 x \sec^2 x}{(1 + \tan^3 x)^2} \mathrm{~d} x\) Subst. \(u = 1 + \tan^3 x \Rightarrow \mathrm{d} u = 3 \tan^2 x \sec^2 x \mathrm{~d} x\). Limits \(1 \to 2\)