- #1
chung963
- 3
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Homework Statement
I'm doing a optimisation question and I get to a point where I have to verify a maximum using a double derivative and I need to differentiate -5sin^2(x)
Homework Equations
-5sin^2(x)
The Attempt at a Solution
-10cos(x)sin(x) I am not sure if the answer is positive or negative.