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 1Trigonometric functionsRelated: Identities express structural relations such as sine squared plus cosine squared equaling one.TrigonometryRelated: Identities relate function values and simplify trigonometric expressions.Algebraic identityBroader topic: Trigonometric identities apply the same all-input principle to angle-dependent functions.De Moivre's formulaNarrower topic: Expanding powers with the formula yields identities for multiple-angle sine and cosine.Integration by substitutionCompared with: An identity may simplify a trigonometric integrand without replacing the integration variable.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.Differentiation of trigonometric functionsRelated: Identities simplify derivative expressions and connect formulas for related functions.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.