lean_workbook_plus_51901

Open

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

$\sinh(x) = \frac {e^x - e^{ - x}}{2}$ , prove $-\sinh( - x) = \sinh(x)$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_51901 : ∀ x, -sinh (-x) = sinh x   :=  by sorry

Source