# What is the equation of the line normal to #f(x)=- tan(2pix -2)# at #x=3#?

##### 1 Answer

Jul 21, 2016

#### Explanation:

Point:

To find the slope, we need to take the derivative of

The slope normal/perpendicular would be

Therefore at x=3, the perpendicular slope would be

Now, we just need to plugin everything in the point-slope form.