1. The problem statement, all variables and given/known data
use the definition of derivative to find the derivative of tan(x)
2. Relevant equations
Tan(x)= sinx/cosx
3. The attempt at a solution
i used sinx/cosx, and then use quotient rule, not sure if it is call "definition of derivative"so, is there anyway i can use f(x+h)f(x)/h to find the derivative of tan (x)?
