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Let, f : R rarr R be given by f(x) = tan...

Let, `f : R rarr R` be given by `f(x) = tan x`. Then `f^-1(1)`=

A

`pi/4`

B

`{n pi+pi/4 : n in Z}`

C

does not exist

D

none of these

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The correct Answer is:
B
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