SOLUTION: what is the value of the expression cos-1 (√2\2) ?

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Question 241747: what is the value of the expression cos-1 (√2\2) ?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
From the unit circle, we see that .


So applying the inverse cosine to both sides gets us: .


which simplifies to .


So where we're restricting the angle to be between 0 and