Let f : ( - 1, 1 ) → B be a function defined by f ( x ) = 2 1 x 1 2x tan - - , then f is both one-one and onto when B is the interval

Let f : ( - 1, 1 ) → B be a function defined by f ( x ) = 2 1 x 1 2x

1.	Let f : ( - 1, 1 ) → B be a function defined by f ( x ) = 2 1 x 1 2x tan - - , then f is both one-one and onto when B is the interval
A.	(0,π/2)
B.	(0,(-π)/2)
C.	(π/2,(-π)/2)
D.	((-π)/2,π/2)
Answer» E.