Let f : R → R be given by f(= tan x. Then f-1(1) is
A. \(\frac{\pi}{4}\)
B. {nπ + \(\frac{\pi}{4}\); n ∈ Z}
C. Does not exist
D. None of these
Answer:B
Let f : R → R be given by f(= tan x. Then f-1(1) is
A. \(\frac{\pi}{4}\) B. {nπ + \(\frac{\pi}{4}\); n ∈ Z} C. Does not exist D. None of these