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Question: Answered & Verified by Expert
\(\int_0^{\pi / 4} \tan ^2(x) d x=\)
MathematicsIndefinite IntegrationAP EAMCETAP EAMCET 2020 (21 Sep Shift 1)
Options:
  • A \(\frac{\pi}{4}\)
  • B \(\frac{\pi}{4}-1\)
  • C \(1-\frac{\pi}{4}\)
  • D 0
Solution:
2828 Upvotes Verified Answer
The correct answer is: \(1-\frac{\pi}{4}\)
\(\begin{aligned}
I & =\int_0^{\pi / 4} \tan ^2 x d x=\int_0^{\pi / 2}\left(\sec ^2 x-1\right) d x \\
& =[\tan x-x]_0^{\pi / 4}=1-\frac{\pi}{4}
\end{aligned}\)
Hence, option (c) is correct.

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