Change in altitude for a car on a 3.1-degree incline over 2.90 km

[ccdalamp]

I am just starting my physics course and am very lost as to how to solve this problem.
Please help...

Homework Statement

A certain mountain road is inclined 3.1 degrees with respect to the horizon. What is the change in altitude of the car as a result of it traveking 2.90 km along the road?

Homework Equations

The Attempt at a Solution

 

[hage567]

Did you draw a diagram? Think of a triangle.