`f(t) = t + cot(t/2), [(pi/4), ((7pi)/4)]` Find the absolute maximum and minimum values of f on the given interval

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`f(t)=t+cot(t/2)`

differentiating,

`f'(t)=1-1/2csc^2(t/2)`

Now to find the absolute extrema of the function , that is continuous on a closed interval, we have to find the critical numbers that are in the interval and evaluate the function at the endpoints and at the critical numbers.

Now to find the critical numbers,...

(The entire section contains 159 words.)

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