2cos(x)+√3=0
2cos(x) = -√3
cos(x) = -√3/2
Now using the unit circle, we can determine the solution:
x = 5PI/6, or x = 7PI/6 with the intervals [0, 2PI].
When solving trig equations, its good to remember that solution is where both the equations intersect and you can confirm your solution, graphically.
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Verified answer
2cos(x)+√3=0
2cos(x) = -√3
cos(x) = -√3/2
Now using the unit circle, we can determine the solution:
x = 5PI/6, or x = 7PI/6 with the intervals [0, 2PI].
When solving trig equations, its good to remember that solution is where both the equations intersect and you can confirm your solution, graphically.