SOLUTION: What is the degree of an angle whose cosine is .86

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Question 3441: What is the degree of an angle whose cosine is .86
Answer by Pieter(35) About Me  (Show Source):
You can put this solution on YOUR website!
You have to take the ANTICOSINE of 0.86
Here in my country we note is as Bgcos(0.86) but i guess you write the anticosine as arccos(0.86). On a calculator this is often noted as cos^(-1) (what is actually wrong!)
The angle will be 30°
(0.86 = (sqrt(3))/2, one of the common values you get in trigonomety)

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