SOLUTION: Evaluate cos-1(square root 2over 2) in both radians and degrees if it exists.

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Question 191882This question is from textbook saxon algebra.com
: Evaluate cos-1(square root 2over 2) in both radians and degrees if it exists. This question is from textbook saxon algebra.com

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
If you look at the unit circle:





You'll see that at the point on the circle that has the x-coordinate x=sqrt%282%29%2F2 (in the first quadrant), the angle is pi%2F4 or 45 degrees.


So this means that (in radians) or (in degrees)