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UPSC NDA I 2024 Mathematics Paper

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Consider the following for the next two (02) items that follow :

Let

\phi(a)=\int\limits_{a}^{a+100\pi}\left| \sin \;x\right|dx

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Question : 89 of 120

Marks: +1, -0

What is

ϕ(a)

equal to ?

0
$a$
$100 a$
200

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