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First find derivative

3cosx-3sinx

to find inflection points, just take the second derivative, set it to zero and solve for x.

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so the second derivative is -3sinx-3cos x

but how would i solve for that

factor out the -3?

set to 0 solve for x

what about the concave up and down?

but since its between 0 and 2pi i do 0, pi/2, pi/3, pi?

Been a while since I did this. We need Lokisan or Xavier

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