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UPSC NDA I 2011 Mathematics Paper

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Question : 8

Total: 120

If f(x) is an even function, then what is

πf(cos‌x)dx equal to?

0
∫
0
‌
π
2
f(cos‌x)dx
2‌
∫
0
‌
π
2
f(cos‌x)dx
1

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