SOLUTION: What is the exact value of- cos^-1 (cos 2/7)

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Question 603948: What is the exact value of-
cos^-1 (cos 2/7)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
What is the exact value of-
cos^-1 (cos 2/7)
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This problem is not written properly. The inverse of a trig function requires a value not an angle as it appears in this case. You probably meant cos=2/7.