Also Try Math Lessons (Awesome Library) Provides lessons, worksheets, and activities. 6-00 Lesson Plans Measuring Astronomical Distances (HighWired.com) Provides "some of the more common techniques for measuring the distance of stars and galaxies and how and why astronomers developed them." 3-01 Measuring Astronomical Distances (HighWired.com) Provides "some of the more common techniques for measuring the distance of stars and galaxies and how and why astronomers developed them." Features use of the trigonometric parallax. 3-01 Trigonometry - Basic Course (Clark University - Joyce) Provides explanations, diagrams, problems, and answers for basic trigonometry concepts and problems. 4-00 Trigonometry - Equations and Triangles (Thinkquest Team 20991) Provides examples of inverse trigonometry ratios, trigonometry equations, triangles, and laws of sines and cosines. Also includes a quiz. 5-00 Trigonometry - Solving Right Triangles (Clark University - Joyce) Provides an explanation and problems for solving right triangles. Includes answers. 4-00 Trigonometry - Solving a Right Triangle (Discovery.com - WebMath) Provides a lesson and the missing information when you fill in portions of the problem. 4-00 Trigonometry Basics (Thinkquest Team 20991) Provides basic trigonometry tutorials for ratios, rotations, radians, graphs and graphing, cofunctions, Pythagorean, quotient identities, cosine, sine, tangent, and double identities. Also includes proving identities. 5-00 Trigonometry Identities (Thinkquest Team 20991) Provides examples to teach about cosine, sine, tangent, and double identities, as well as proving identities. Also includes a quiz. 5-00 Lists Trigonometry Resources (AOL - Academic Assistance Center) Includes right angles, circles, lines, polyhedra, triangles, finding the hypotenuse, and more. 5-00 Trigonometry Resources (Fife and Husch) Provides nearly three dozen sources on trigonometry. 5-00 Trigonometry Resources (Math Forum) Papers Astronomy and Trigonometry (Javed) Provides formulas for calculating distances to stars. 6-01 Trigonometry (Zobel) Provides definitions and graphs of trigonomic functions. Includes an animation of sin(x). 4-00 Trigonometry - Formulas for Triangles (Levy) Provides formulas and diagrams for triangles. 5-00 Trigonometry - More Advanced (S.O.S. Mathematics) Provides problems and solutions. 6-01 Trigonometry Basics (Freeman) Provides an introduction to the most basic formulas. 6-01 Trigonometry Basics (Kelly) Provides an introduction and formulas for solving basic trigonometry problems. Includes Definitions and basics, Trigonometric circle and angles, Trigonometric numbers of a real number t, Basic formulas, Related values, Supplementary values, Complementary values, Opposite values, Anti supplementary values, The right-angled triangle, Area of a triangle, Sine rule, Homogeneous expression in a, b and c, Cosine rule, Trigonometric functions, The sine function, The cosine function, The tangent function, The cotangent function, Inverse Trigonometric Functions, The arcsin function, The arccos function, The arctan function, The arccot function, Sum formulas, cos(u - v), cos(u + v), sin(u - v), sin(u + v), tan(u + v), tan(u - v), sin(2u), cos(2u), tan(2u), Carnot formulas, t-formulas, Special values, pi/3, pi/4, pi/6, Trigonometric equations, Base equations, cos(u) = cos(v), sin(u) = sin(v), tan(u) = tan(v), cot(u) = cot(v), Reducing to base equations, Using an additional unknown, Using factorization, The equation a.sin(u)+b.cos(u) = c, Homogeneous equations, and Calculations with inverse trigonometric functions. 6-01 Trigonometry Basics - Problems and Solutions (Discovery.com - WebMath) Provides solutions and answers to basic problems in trigonometry, including Right Angle Relationships, Graphing Trig Functions, Simplifying Trig Functions, and Polar Graphs. 6-01 Trigonometry Explained (Columbia Encyclopedia) Explains the basics of trigonometry for advanced students. 5-00 Trigonometry Functions - History (University of St. Andrews, Scotland) Provides a history of trigonometry functions and the mathematicians behind their discovery. 4-00 Trigonometry Questions and Answers (Math Forum - Ask Dr. Math) Includes key questions asked by high school students about trigonometry problems. 7-99

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