FunctionHard
Question
[cot x]dx, [•] denotes the greatest integer function, is equal toOptions
A.

B.1
C.- 1
D.

Solution
Let I =
[cot x] dx .....(1)
=
[cot(π - x] dx =
[- cot x] dx .....(2)
Adding (1) and (2)
2l =
[cot x] dx +
[- cot x] dx =
(-1) dx
= [-x]0x = - π
∴ I = -
[cot x] dx .....(1)=
[cot(π - x] dx =
[- cot x] dx .....(2)Adding (1) and (2)
2l =
[cot x] dx +
[- cot x] dx =
(-1) dx= [-x]0x = - π
∴ I = -

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