- #1
Absolutism
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Homework Statement
f(x)=sin(2x+5)
Homework Equations
I am supposed to find the derivative, and the domain of it. The problem is that I cannot deal with the simplification of it.
The Attempt at a Solution
As far as I know, I am suppsosed to use f(x+h)-f(x)/h
= sin(2(x+h)+5)-(sin(2x+5))/h
I tried expanding what's inside, as in sin(2x+2h+5)-sin(2x+5)/h
But that doesn't seem to lead to a solution
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