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 Suma y resta Producto por escalar Producto Inversa
 Monomials Polynomials Special products Equations Quadratic equations Radical expressions Systems of equations Sequences and series Inner product Exponential equations Matrices Determinants Inverse of a matrix Logarithmic equations Systems of 3 variables equations
 2-D Shapes Areas Pythagorean Theorem Distances
 Graphs Definition of slope Positive or negative slope Determine slope of a line Equation of a line Equation of a line (from graph) Quadratic function Parallel, coincident and intersecting lines Asymptotes Limits Distances Continuity and discontinuities
 Sine Cosine Tangent Cosecant Secant Cotangent Trigonometric identities Law of cosines Law of sines
 Equations of a straight line Parallel, coincident and intersecting lines Distances Angles in space Inner product

 Reciprocals and multiplicative inverses If the product of two numbers is 1, the numbers are called reciprocals, or multiplicative inverses, of each other. 8 is the multiplicative inverse of , and is the multiplicative inverse of 8, because Strategy. To find the reciprocal of a fraction, we invert the numerator and the denominator. Find the reciprocal of . The reciprocal of is because All real numbers, except 0, have a multiplicative inverse. Exercises