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## Homework Statement

A projectile is launched 80m/s into the air at angle x to the horizontal off the top edge of an infinitely long hill(inclined plane). The hill makes a 35 degrees angle to the horizontal

a) Derive an equation for the range(maximum horizontal displacement).

b) At what angle will the projectile have maximum range?

## Homework Equations

I know the equation for range of an even surface and how to derive it but I don't think that will be of help here.

## The Attempt at a Solution

Is this question even possible?

I'm tried to derive an equation but with no luck. That's the hard part. I think I just need to differentiate the equation to get the angle of maximum range.