Determine the points of inflections with trig

The video tutorial explains how to use the second derivative test to find points of inflection in a function. It begins by finding the first and second derivatives, then uses the unit circle to determine when the second derivative equals zero. The tutorial emphasizes the importance of checking points to the left and right of potential inflection points to confirm changes in concavity. The instructor also highlights common mistakes and the need for careful evaluation, concluding with a summary of key concepts and takeaways.

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