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Law of cosinesLaw of sinesSpherical trigonometryPythagorean trigonometric identityDirection cosinePythagorean theoremTrigonometric functionsAngle bisector theoremTriangle inequalityGeometric mean theoremPtolemy's theoremTrapezoidal ruleLaw of tangentsPythagorean additionTangent half-angle formulaTangent-secant theoremTangential quadrilateralQuadratic reciprocityInverse function ruleTrigonometryEuler's formulaTangential angleIntersecting chords theoremConic sectionAltitudeParallelogram lawSine and cosinePolar coordinate systemAngleSubtended angleIntercept theoremApollonius's theoremTriangulationSpherical meanSolution of trianglesTriple product ruleSquareEuclidean plane isometrySpherical sectorOsculating planeGauss's law for gravityPoisson summation formulaSesquilinear formDistance from a point to a planeEllipseTangential polygonIsomorphism theoremsDivergence theoremPolar circleBrahmagupta's formulaRigid transformationTrigonometric substitutionIsometryHurewicz theoremMorley's trisector theoremIsosceles trapezoidConvolution theoremBrahmagupta theoremSpherical angleFundamental theorem of calculusRhombusHyperbolic functionsTriangle centerEuler's theorem in geometryMetric tensorOrthogonalitySpin-weighted spherical harmonicsTrigonometric polynomialLagrange inversion theoremAtan2QuadricPerpendicular distanceExterior angle theoremRiemannian geometryGauss's lawHyperbolic secant distributionPtolemy's inequalityRegular polygonRadiusTangent spaceProduct ruleLaw of total probabilityIncenterSum of angles of a triangleSpherical polyhedronInverse trigonometric functionsSpiral of theodorusQuotient ruleBarycentric subdivisionSimons' formulaTriangular prismCross-ratioSine waveCoarea formulaCalculus on euclidean spacePolarization identityParallelogramDistributive propertyIntegration using euler's formulaLefschetz hyperplane theorem