Question

Definition of Derivative
Ill write the question in a post.

Answer 1

\[\lim_{h \rightarrow 0} \frac{ \tan(4+h) - \tan(4) }{ h }\]

Answer 2

I dont know how to simplify this :(.
Any help?

Answer 3

\[Tan(a+b)=\frac{ Tan(a)+Tan(b) }{ 1-Tan(a)Tan(b) }\]

Answer 4

Oh god I hate trig ID's

Answer 5

Thanks for getting me started

Answer 6

Wouldnt that simply to

((tan(4) - tan(4))/h
0/h
0/0 Undefined
What am I doing wrong?