SOLUTION: how do i solve cos theta minus 1 equals negative one

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Question 304674: how do i solve cos theta minus 1 equals negative one
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
solve cos theta minus 1 equals negative one
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Let theta be "x"; (It's more convenient.)
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Equation:
cos(x) - 1 = -1
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cos(x) = 0
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x = (90+-180n)degrees, where n = 0,1,2,3,...
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Cheers,
Stan H.