KEAM 2010 Math Paper

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Question : 31 of 120

Marks: +1, -0

If

y=tan−1x+sec−1x+cot−1x+cosec−1x

then ‌

dy

dx

is equal to

‌
x2−1
x2+1
π
0
1
‌
1
x√x2−1

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