SOLUTION: cos^2x+cosx=0 what is x from 0 degree to 360 degrees

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Question 390542: cos^2x+cosx=0 what is x from 0 degree to 360 degrees
Answer by Alan3354(69443) About Me  (Show Source):
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cos^2x+cosx=0 what is x from 0 degree to 360 degrees
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cos^2x+cosx=0
cos(cos + 1) = 0
cos(x) = 0
x = 90º, 270º
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cos(x) = -1
x = 180º