Week 14-precalc 11

this week we started trigonometry. One key idea was coterminal arms

Coterminal arms are angles with the same terminal arm. So for example, an angle  of 50, 410, and 770 degrees are all coterminal. The reason for this can be shown with a diagram

Basically, we measure this from the horizontal line upwards. If it is a positive angle, we move counter clockwise. To reach 50 degrees, you have a rotational degree of 50. Then, we can move all the way around to reach that same coterminal arm by turning an extra 360 degrees. When you add these together, you get 410. And if you add another 360, you reach 770 degrees.

Leave a Reply

Your email address will not be published. Required fields are marked *