Trigonometry for the unwilling

Despite being slightly math-phobic, trigonometry made sense to me. I just kept imagining a ladder leaning against a wall, and I'd do all right. Trigonometry was concrete. And it should be easier to digest for you students -- it's taught in fourth year high school, right around the time when you're thinking of what college course to apply to, and what to do for the rest of your life. Especially you people with engineering-related aspirations... you should embrace this subject and not snooze through it.

• David E. Joyce's short course in trigonometry on the Clark University site
• Trigonometry tutorial on Thinkquest's Math for Morons Like Us site
• Basic Trigonometry on OnlineMathLearning.com

Searching for "basic trigonometry" on Youtube will also lead you to a bunch of interesting videos. Go for that if you have a good Internet connection.