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

Algebra ->  Algebra  -> Trigonometry-basics -> SOLUTION: Evaluate cos-1(square root 2over 2) in both radians and degrees if it exists.      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

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(21685) 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)