UPSC NDA Math Model Paper 10

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Question : 107 of 120

Marks: +1, -0

If x and y are positive and xy > 1, then what is tan−1x+tan−1y equal to?

tan−1(
x+y
1−xy
)
π+tan−1(
x+y
1−xy
)
π−tan−1(
x+y
1−xy
)
tan−1(
x−y
1−xy
)

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