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AP EAMCET · Maths · Indefinite Integration

\(\int \sin ^5 x \cdot \cos ^5 x d x=\)

  1. A \(\frac{\cos ^6 x}{60}\left(6 \sin ^4 x+3 \sin ^2 x+1\right)+c\)
  2. B \(-\frac{\sin ^6 x}{60}\left(6 \cos ^4 x+3 \cos ^2 x+1\right)+c\)
  3. C \(-\frac{\cos ^6 x}{60}\left(6 \sin ^4 x+3 \sin ^2 x+1\right)+c\)
  4. D \(\frac{\sin ^6 x}{60}\left(6 \cos ^4 x+3 \cos ^2 x+1\right)+c\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(-\frac{\cos ^6 x}{60}\left(6 \sin ^4 x+3 \sin ^2 x+1\right)+c\)

Step-by-step Solution

Detailed explanation

\[ \begin{aligned} I & =\int \sin ^5 x \cos ^5 x d x \\ & =\int \cos ^5 x \sin ^4 x \sin x d x \\ & =\int \cos ^5 x\left(1-\cos ^2 x\right)^2 \sin x d x \end{aligned} \] Let \(\cos x=t \Rightarrow-\sin x d x=d t\)…