Finding launch angel from velocities

[ijd5000]

I'm having troubling finding a launch angel from a set of given velocities.

v=2$\hat{i}$, 4$\hat{j}$ at t=0

v=2$\hat{i}$, 2$\hat{j}$ at t=1

v=2$\hat{i}$ at t=2

v=2$\hat{i}$, -2$\hat{j}$ at t=3

the g=-2 on this planet

 

[tiny-tim]

hi ijd5000! welcome to pf!

I'm having troubling finding a launch angel from a set of given velocities.

angel?

v=2$\hat{i}$, 4$\hat{j}$ at t=0

doesn't this line tell you the launch velocity?

 

[ijd5000]

Thanks for the welcome!

got it, I'm still a bit shaky with vectors.