Help! Program involving 1st and 2nd Derivative
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This is the Question:
On the interval [0, 2pi], plot the graph of f(x) = sin x + (1/3)sin(3x). In Matlab, find and plot all roots, relative extrema, and inflection points. Plot graphs of f' and f'' on separate axes.
My approach was to graph f, f', and f''. Then i tried to find the zeros of each graph and plot it on its respective curve. However I cannot get all the roots to plot.
Can you help me fix my problem or direct me to another approach that is easier?
Thanks
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