February 25, 2017

Homework Help: Trig

Posted by Trig on Tuesday, November 3, 2009 at 8:27pm.

How come cosine of 225 degrees is a positive number i thought it was negative because it's reference angle would be 45 degrees below the second quadrant and in a unit circle cosine is just the x value so I thought cosine of something in both the second and third were negative

apparently i'm wrong please explain

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions