The first derivative of the continuous function y = f(x) is given below. Find y'' and then use the critical points of f, the

Question

The first derivative of the continuous function y = f(x) is given below. Find y'' and then use the critical points of f, the behavior at the critical points, and any intervals in which the curve is increasing or decreasing to sketch the general shape of the
graph of f.
y' = 3sec^2, π/2 < x < π/2

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