SOLUTION: 2cos(theta)+1=0 It asks for the solution set.

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Question 1024342: 2cos(theta)+1=0
It asks for the solution set.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
2cos%28theta%29=-1
cos%28theta%29=-1%2F2
Two solutions:
theta=120degrees and
theta=240degrees