If z = eiθ, then the value of \(\frac{{{z^2} - 1}}{{{z^2} + 1}}\) is:

If z = eiθ, then the value of \(\frac{{{z^2} - 1}}{{{z^2} + 1}}\) i

1.	If z = eiθ, then the value of \(\frac{{{z^2} - 1}}{{{z^2} + 1}}\) is:
A.	i tan θ
B.	tan θ
C.	i cot θ
D.	i sec2 θ
Answer» B. tan θ