I'm sorry, I didn't write what any of these terms meant because my issue was with the algebra, not the problem's physics.
P(t)=Ft-p_0sin\theta (I think the author did that to simplify the equations) and I'm assuming F is the weight.
Thank you for the help, it didn't occur to me that if I...
I've been studying this rather interesting article about projectile motion in special relativity. The thing is, I can't understand how the author found the trajectory function. He says that he did it by solving the following parametric equation:
x(t)=\frac{cp_0cos\theta}{F}ln\left \{...