maxima minima problem

Question

The greatest value of the function f(x) = 2 sin x + sin 2x on the interval [ 0,3pi/2 ] is ____ .

Comments

is it 2?

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$\frac{3\sqrt{3}}{2}$ ??

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@joshi_nitish

@saxena0612

For what val of x you got max val of function

I am getting stationary point at pi/6.