Prove2Me

Lean-Workbook Plus 26834: Trigonometric identity

Proved
WorkbookRestored.plus_26834

by wamlart · Sep 12, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

lean-workbookrestored-importssource-checked

tan⁡(π/3)=3\tan(\pi/3)=\sqrt3.

Source: Lean-Workbook row lean_workbook_plus_26834 (Apache-2.0). The unchanged proposition comes from the original record; its missing mathematical imports and namespaces are restored here.

Preamble
import Mathlib.Analysis.SpecialFunctions.Trigonometric.Basic
open Real
Formal statement
theorem WorkbookRestored.plus_26834 : Real.tan (π / 3) = Real.sqrt 3   :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, row lean_workbook_plus_26834; immutable original Prove2Me node ed633267-dd5a-484a-8cb5-1f4447678a71

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