Find an equation of the tangent line to the curve y=9tanx at the point (π/4, 9)

The tangent line to at has slope , so first we compute the derivative:

and evaluate it at the point of interest to find the slope:

Then the equation of the tangent line is

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

found it xd it ok yt