SOLUTION: What is exact value of sin^-1(cos 3pi/4)? I got the wrong answer so need to see a visual of how to do it the right way to know where I went wrong. Thank you!

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Question 433347: What is exact value of sin^-1(cos 3pi/4)? I got the wrong answer so need to see a visual of how to do it the right way to know where I went wrong. Thank you!
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
cos(3pi/4) = -sqrt(2)/2
arcsin(-sqrt(2)/2) = -pi/4 or 7pi/4