A S T C Problem 7: Find the exact value of cos .
{"Image DocumentName": "A S T C Problem 7: Find the exact value of cos .", "Image ImageDescription": "We will first draw the angle to determine the quadrant. We see that the angle is located in the 3rd quadrant and the cos is negative in the 3rd quadrant. 0 radians. A. S. T. C. Note that the reference angle is . We know that is the same as 45 , so the reference angle is 45 . Using the special triangle we can see that the cos of 45 or is cos =", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}