"A small object is dragged across a corrugated surface so that its height h above the ground in terms of its horizontal displacement x is given by
h = 2 + (3/2)sin (2x)
The object moves in such a way that the horizontal component of its velocity has a constant value of c, x = 0 at time t = 0.
Find a formula for x in terms of t."
I'm confused as to how I am supposed to obtain x and remove h. I don't understand how the horizontal component relates to this displacement.