SOLUTION: (cos^2(x)=-cos(x) solve for all values of x in the interval 0 degrees is less than or equal to x less than or equal to 360 degrees please.
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Question 606881: (cos^2(x)=-cos(x) solve for all values of x in the interval 0 degrees is less than or equal to x less than or equal to 360 degrees please.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
\ =\ -\cos(x))
on
Put the quadratic into standard form:
\ +\ \cos(x)\ =\ 0)
Factor:
\left(\cos(x)\ +\ 1\right)\ =\ 0)
Hence
\ =\ 0)
or
\ = -1)
Use the unit circle to find the points where the 
-coordinate is equal to either 0 or -1 on the specified interval (namely, once around the circle).
John
My calculator said it, I believe it, that settles it
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