Max distance when an angle for a projectile is pi/4 neglecting air resistance

[Dustinsfl]

We know that the angle of \(\frac{\pi}{4}\) causes a projectile to travel its max distance when air resistance is neglected.

When we consider air resistance is the \(\frac{\pi}{4}\) still the angle that produces the max distance? With air resistance, the projectile with of course travel less than the distance without air resistance though.

 

[MarkFL]

Here is an interesting article that shows the optimal launch angle depends on the details of the drag:

http://www.physics.rutgers.edu/~zapolsky/381/aim.pdf