SOLUTION: Find m(x) in the interval180(degrees)<(or equal)x >(or equal) 270(degrees) that satisfies the equation 2cos x+1=0

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Question 432268: Find m(x) in the interval180(degrees)<(or equal)x >(or equal) 270(degrees) that satisfies the equation 2cos x+1=0
Answer by lwsshak3(6498) About Me  (Show Source):
You can put this solution on YOUR website!
Find m(x) in the interval180(degrees)<(or equal)x >(or equal) 270(degrees) that satisfies the equation 2cos x+1=0
I think you meant 180< x <270 for domain of x
..
2cos x+1=0
2cosx=-1
cosx=-1/2
x= 240 deg in quadrant III