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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 EcuaciÃ³n de una recta Equation of a line (from graph) Quadratic function PosiciÃ³n relativa de dos rectas Asymptotes Limits Distancias Continuity and discontinuities
 Sine Cosine Tangent Cosecant Secant Cotangent Trigonometric identities Law of cosines Law of sines
 EcuaciÃ³n de una recta PosiciÃ³n relativa de dos rectas Distancias Angles in space Inner product

 Trigonometry Trigonometric functions at related angles Using the geometric symmetry of the unit circle, some trigonometric functions can be established. You can calculate the trigonometric functions of an angle in the second, third or fourth quadrant using its ratio with the first quadrant. Angles that differ by 180º If A and B are two angles that B - A= 180º, that is, B=180º + A, then: sinA = -sin B, so that, sin A = -sin(180º+A) cosA = -cos B , so that, cosA = -cos(180º+A) Similarly tanA = tanB Using these formulas, you can calculate the trigonometric functions of an angle in the third quadrant if you know the trigonometric functions of the angle that differs with it 180º. If sinA = 0.707 and cosA = 0.707 Calculate the sine, cosine and tangent of the angle whose difference with A is 180º. Solution: Sine = Cosine = Tangent = (round the solution to thousandths)