SOLUTION: Find the exact value of arccos (cos 21(3.14)/8)

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Question 923466: Find the exact value of arccos (cos 21(3.14)/8)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Find the exact value of arccos (cos 21(3.14)/8)
This reads:
an angle whose cos is 21(3.14)/8
so,arccos (cos 21(3.14)/8)=21(3.14)/8
..
for example: arcsin(sin30˚)=arcsin(1/2)=30˚