KnowraTrigonometric identityLinked fromLinked fromThe 10 pages that link to Trigonometric identity, each with the reason it gives.All 10Broader topic 1Related 3Narrower topic 5Compared with 1De Moivre's formulaNarrower topic: Expanding powers with the formula yields identities for multiple-angle sine and cosine.Pythagorean trigonometric identityNarrower topic: The Pythagorean identity is one member of this broader class of equations.Bottema's theoremNarrower topic: Perpendicularity and side-length conditions often simplify through standard angle identities.Law of cotangentsNarrower topic: The law is an angle-constrained identity among cotangent values.Mollweide's formulaNarrower topic: Mollweide's formulas are triangle-specific identities within this broader class.