SOLUTION: Find the exact value of s in the interval [0,pi2] if cos s=0.7826

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Question 806543: Find the exact value of s in the interval [0,pi2] if cos s=0.7826
Answer by Edwin McCravy(20065) About Me  (Show Source):
You can put this solution on YOUR website!
You can't get the exact value for it is irrational and cannot
be expressed in radicals and integers.
It's approximately 0.671964864979 radians.