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AP EAMCET · Maths · Definite Integration

If 0πlog(sinx)dx=8k, then 0π/4log(1+tanx)dx=

  1. A k
  2. B -k
  3. C k2
  4. D 4 k
Verified Solution

Answer & Solution

Correct Answer

(B) -k

Step-by-step Solution

Detailed explanation

Let I=∫0π/4log(1+tanx)dx Using property of integration ∫0af(x)dx=∫0af(a-x)dx ⇒I=∫0π4log1+tanπ4-xdx ⇒I=∫0π4log21+tanxdx ⇒I=∫0π4log2dx-∫0π4log1+tanxdx…