Hey people, first time posting. This isn't really homework, but I want to know how to apply inverse trig functions. So, while looking over some problems in my textbook, I came across the following, which I really have no idea how to do. 1. The problem statement, all variables and given/known data A ladder 10ft long leans against a wall. The bottom of the ladder (on the floor) slides away from the wall at 2ft/sec. How fast is the angle between the ladder & the wall changing when the bottom of the ladder is 6ft from the base of the wall? 2. Relevant equations 3. The attempt at a solution Since the ladder is 10ft (hypothenuse), the distance from the ladder to wall is 6ft (opposite), then I can figure the wall is effectively 8ft (adjacent). I assume the angle [tex]\Theta[/tex] can be figured with any inverse trig function. I know the answer (1/4 rad/s), but that's not really important. I want to be able to understand how to approach this type of problem.