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At what points, f(x)=1+2 sin x + 3 cos^(...

At what points, `f(x)=1+2 sin x + 3 cos^(2)x, 0 lt x lt (2pi)/(3)` has maximum or minimum ? Find the maximum and minimum value of the function.

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The correct Answer is:
For `x=sin^(-1)((1)/(3))`, Maximum value `(13)/(3)` and `x = 90^(@)`, Minimum value = 3.
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