Can I use the range formula for this

[Juicy J]

Homework Statement

Projectile is launched off cliff at 45 degrees. The coordinates from which the thing is launched are (4.5, 4.8). I had to do this via computer simulation (interactive physics) with different V_xo and V_yo used

Given:
X_o 4.5
Y_o 4.8

I additionally recorded the H_max, X^f and the V_o can be found because the components are given

We compare the computer readout (reading a graph) and maunally check if the computer solves for g correctly

Homework Equations

R=(V_o)²/g times sin2theta

If their was no cliff and launched from ground, R is |X_f-X_o|

For another problem, when a projectile was launched from the ground and impacts the ground, I put in all the variables and solved for g and recorded the percent error of that solved variable (g) from 9.81

The Attempt at a Solution

Try to use the range equation. I can't remember if my professor said I had to use this. If not, then I can varify g using the max height when the V_fy is 0. Just wondering if it is possible.

 

[AvroArrow]

I am not sure if the range equation is only for when the projectile does not hit an object.I used the max height equation to verify g and compared it to 9.81. My error was 1.9% which was pretty good. But, I am still confused as to how I can use the range equation to solve for g. Is it even possible?