Trigonometry

• Here is your first test: T1.
• Try this online quiz, "Trig-a-gnosis", for testing your understanding of the values of sines and cosines. No scores are generated, it is just for your own use. (You should also try the following: using graph paper, draw an angle θ in standard position, terminating at the point (x, y); guess the sine and cosine of θ, just by looking; measure the values of x, y, r and θ; compute the values of sin(θ) and cos(θ) from their definitions involving x, y, r; then use a calculator to check the values of sin(θ) and cos(θ) for comparison. When your guesses start to get good, you understand what sine and cosine mean.)
• For understanding graphs of sine and cosine functions (Chapter 4), here is a crude online quiz that generates sinusoidal curves, for testing your ability to write an equation of such a curve.
• A few old exams, with and without answers. Your exam will be different, of course.
  • Fall 2008. Here are T1, T2, T3 and the final exam. Here is the Final Exam with answers.
  • Summer 2005. Here are T1, T2 and the final exam.
  • Summer 2005 exams with solutions (some extra-credit problems are left unanswered): T1 with answers, T2 with answers, Final Exam with answers.
• A visual proof of "adding like sines". This will make more sense near the end of the semester, toward the end of Chapter 5.
• An optical illusion created with a bit of trigonometry. (Trig isn't actually required, but it makes it easy.) A student showed me a copy of a similar illusion, so I used Mathematica to generate my own, for fun.
• A site with some visually based quizzes, from the maths online gallery, recommended by a former trig student.
• Now let us be clear: NOBODY in this class is a dummy! But one of my former students in this class told me that Trig For Dummies is a good supplementary text. I presume it is carried in any store where books for dummies are sold.
• Your textbook's homepage is here.

You might want to check the Web for Trig stuff. You could start at the site below, but you'll probably need to dig around awhile before finding something you like. (Hey --- no heavy surfing until you've done your homework.)