I am having trouble with this problem :
use the second derivative test to find all relative extrema of f(x)=2sin(x)+cos(2x)
I differentiated and got to 2cos(x)-2sin(2x)
what should I do next?
Follow Math Help Forum on Facebook and Google+
You'll need the second derivative to see whether a given extremum is a max or a min. So take the second derivative.
View Tag Cloud