SOLUTION: How do you evaluate the following expression without using a calculator? 64^cos^2(x)=8

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Question 852899: How do you evaluate the following expression without using a calculator?
64^cos^2(x)=8
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How do you evaluate the following expression without using a calculator?
64^cos^2(x)=8
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cos^2(x) = 1/2
cos(x) = sqrt(2)/2
x = pi/4, 7pi/4 + 2n*pi, n = 0,1,2,3...