I asked this earlier but need some additional help at the end.... Find all critical numbers in the function f(x) = 7 + √3 (X) - 2sinX on the interval 0 < x < 2π    [That is 7 + (square root of 3)X - 2sinX}   I get it up to finding the dirivative and setting f'(x) = 0,    0 = √3 - 2cos(x) cos(x) = √3 / 2. I am not understanding how to finish the problem

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