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Pythagorean theoremPythagorean trigonometric identityTriangle inequalityTrigonometric functionsHypotenuseMatrix multiplicationLaw of cosinesCongruent numberEuclidean distanceMatrix additionRational numberGeometric mean theoremTrigonometryAngle bisector theoremSquare triangular numberTrigonometric substitutionLaw of sinesApollonius's theoremLogarithmic meanDifference of two squaresFrobenius inner productTriangulationPythagorean meansBinary operationDistributive propertyTangent half-angle formulaFibonacci numberGolden ratioSign functionEuclidean divisionDyadic rationalMultiplication tableDirichlet convolutionPascal's triangleBinomial theoremPerpendicular distanceSum of two squares theoremPolar coordinate systemCross productPtolemy's theoremBinary functionDivisor functionPythagorean intervalAlgebraic expressionTrigonometric interpolationArithmeticPentagonal number theoremQuotient ruleLength functionHarmonic meanDistanceLegendre's three-square theoremIsometryAltitudeOrthogonalityTraceFieldBinary quadratic formAlgebraic operationAnglePolynomial long divisionPrime-counting functionTrigamma functionBell triangleMean squareJacobi identityNumber theoryEquationPolar circleChain ruleTrapezoidal ruleCartesian productSummationUnit intervalEquivalence relationParallelogramPrime number theoremDiophantine equationPascal's ruleInverse function ruleAlgebraic numberMultiplication signQuadratic reciprocitySquare numberSum of angles of a triangleBisection methodOrthodiagonal quadrilateralIsoperimetric inequalitySolution of trianglesTriangle groupOrdinal arithmeticRational functionAlgebraic fractionRhombusDot productGreatest common divisorEuler's formulaSymmetric differenceBilinear interpolationAxial ratio