Revise using bearings in trigonometry for your National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.

I didn’t have a protractor handy, unlike when I was in high school and carried one at all times. But then I realized it was a rare chance to apply some trigonometry.

Two New Orleans high school students have proven the Pythagorean Theorem using trigonometry without relying on circular reasoning. That should be impossible.