Trigonometry

• A quiz on finding equations for sinusoidal curves.
• For those of you struggling or rusty with basic algebra (especially fractions), try a few of these crude online quizzes, especially the first two.
  • adding, multiplying and simplifying fractions
  • complex fractions
  • simplifying fractions with integer exponents
• A few old exams, with and without answers.
  • Here are T1, T2 and the final exam from summer 2005.
  • Here they are with solutions (some extra-credit problems are left unanswered) T1 with answers, T2 with answers, Final Exam with answers.
• 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; guess its sine and cosine; measure the values of x, y and r; compute the values of sine and cosine; then use a calculator to check. When your guesses start to get good, you understand what sine and cosine mean.)
• A visual proof of "adding like sines". This will make more sense near the end of the semester.
• 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.)