- #1

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- 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.