# Homework Help: How do we calculate the Max value of x?

1. Sep 5, 2010

### osy044

1. The problem statement, all variables and given/known data
where

x=(4aV^2tan$$\alpha$$)/(V^2+2ag+2agtan^2$$\alpha$$)

where a, V, g are constant. g is gravitational field strangth.
what is the greatest value of x as $$\alpha$$ varies?

how do i even start?

2. Relevant equations

3. The attempt at a solution

2. Sep 5, 2010

### vela

Staff Emeritus
How do you usually find the maximum of a function?