Free lessons in arithmetic, algebra, geometry, trigonometry and calculus. Dave's short course in trigonometry. Table of Contents Who should take this course? Trigonometry for you Your background How to learn trigonometry Applications of trigonometry Astronomy and geography Engineering and physics Mathematics and its applications What is trigonometry? Trigonometry as computational geometry Angle measurement and tables Background on geometry The Pythagorean theorem An explanation of the Pythagorean theorem Similar triangles Angle measurement The concept of angle Radians and arc length Exercises, hints, and answers About digits of accuracy Chords What is a chord? Ptolemy’s sum and difference formulas Ptolemy’s theorem The sum formula for sines The other sum and difference formulas Summary of trigonometric formulas Formulas for arcs and sectors of circles Formulas for right triangles Formulas for oblique triangles Formulas for areas of triangles Summary of trigonometric identities More important identities Less important identities Truly obscure identities About the Java applet.
Interactive Mathematics Online. As of July 1, 2013 ThinkQuest has been discontinued. We would like to thank everyone for being a part of the ThinkQuest global community: Students - For your limitless creativity and innovation, which inspires us all. Teachers - For your passion in guiding students on their quest. Partners - For your unwavering support and evangelism. Parents - For supporting the use of technology not only as an instrument of learning, but as a means of creating knowledge. We encourage everyone to continue to “Think, Create and Collaborate,” unleashing the power of technology to teach, share, and inspire. Best wishes, The Oracle Education Foundation. Free lessons in arithmetic, algebra, geometry, trigonometry and calculus. Math.com - World of Math Online. Oswego City School District Regents Exam Prep Center. Trig Cheatsheet. Www.ies.co.jp/math/java/trig/index.html. Summary of trigonometric identities. Discovering Trigonometry.
Back to Dave’s home page Q: What is trigonometry? A: Trigonometry is the study of how the sides and angles of a triangle are related to each other. Q: WHAT? That’s all? Q: You mean trigonometry isn’t some big, ugly monster that makes students turn green, scream, and die? Q: Oh. Let’s start. This material assumes that you know: How to measure angles.That a right angle is is 90 degrees.The sides of a triangle: the base, the height, and the hypotenuse.
If you aren’t familiar with these concepts, you’ll have to ask your math teacher to assist you with them. Comments welcomed. Download the .ZIPped source files. Trigonometry - maths online Gallery. Trigonometry: A Crash Review. Trigonometry: A Crash Review Unfortunately, for much of this subject, there is no substitute for brute memorization. This course is often used as pre-calculus. "Algebra masters" will have a much smaller memorization load than other students. [I mean College Algebra, not the higher-math version.] Much of this subject is highly dependent on either calculators+ or tables [slide rules have been passé since the electronic calculator, but could be used.] Easily review trigonometry as you work at a computer! Note: in many places, I will mention algebraic identities. Note: There are several kludge notations lurking in this crash review: SQRT for "square root" (correctly notated for 2, 3, 5, and 6)pi for π (correctly notated outside of popup text for pictures) I will remove instances of these kludge notations, without advance warning, when it is convenient in my schedule to do so.
Trigonometry Survival 101 -- basic material [not coordinate geometry] Formula Lists Self-quizzes Trig FAQ, J. Note: -X. K-12 - Course Products. Trigonometry Notes. Probability - Curriculum Resources.