 Complex inverse sine

ID: complex-inverse-sine

Codex  0 Created 2026-09-24 Updated 2026-10-14

C ∖ ((- \infty, - 1] \cup [1, \infty))

is the branch

arcsin z = \int_{0}^{z} \frac{d t}{1 - t ^{2}}

whose derivative equals one at zero.

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