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Let f : R rarr Rbe given byf(X) = tan x,...

Let `f : R rarr R`be given byf(X) = tan x, then `f^-1` (1) is

A

`pi/4`

B

`{npi + pi/4, n in Z}`

C

does not exist

D

none of these

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PRADEEP PUBLICATION-RELATIONS AND FUNCTIONS-EXERCISE
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