f(x)=x^2exp(sin(x))−cos(x) on the interval [0,pi/2], I have shown the function is continuous and that there is at least one solution on the interval via using IVT, I know I have to find another solution in the interval such that f(x)<0, f(x)>0 and then f(x)<0, just wondering what is the best way to approach, Im sure there must be a more effective way than just to number crunch, could we consider MVT on the interval, many thanks in advance.

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