For each function on the given interval, find the absolute  maximum and/or minimum points and values. G(x) = cos2x + 2sinx on [-pi, pi]

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Find the absolute maximum and minimum on the interval `[-pi,pi]` for the function `G(x)=cos2x+2sinx`

The function is continuous on the closed interval and differentiable on the open interval so there is an absolute maximum and an absolute minimum on the interval.

To find the extrema we find the critical points (where G'(x)=0) and...

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