SOLUTION: find all real numbers that satisfy the equation cos (X/2)= sqrt2/2

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Question 766930: find all real numbers that satisfy the equation
cos (X/2)= sqrt2/2
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find all real numbers that satisfy the equation
cos (X/2)= sqrt2/2
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x/2 = pi/4 or 45 degrees
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x = (1/2)pi or 90 degrees
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Cheers,
Stan H.
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