 #1
Tjaz Gantar
 4
 0
 Homework Statement:
 Find a bijection between A and B.
 Relevant Equations:

A = (−∞, 0) ∪ (0, ∞) ⊂ R,
B = {(x, y) ∈ R2 x2 − y2 = 1}
So I don't really have any goods ideas on how to try and solve this. I only know that using tangent function is supposedly a good idea.