Alright, I'm going to update this for you since apparently there is a lot of confusion. g is that gravitational constant of acceleration. V(i) is the initial velocity, as stated above. The context is a launch simulation, and the problem asks for a derivation. The lack of parentheses does say...
1. Derive this equation
t = 2(vi)/g*sin(theta)
where vi isinitial velocity, and g is acceleration due to gravity
2. Implicit differentiation, possibly gravity as a constant.The Attempt at a Solution
t = 2(vi)/v*sin(theta)
dt/d(theta) = 2(vi)/g * dt/d(theta)(sin(theta))
dt/d(theta) = 2(vi)/g *...