Projectile Motion without the Angle

[SHISHKABOB]

Homework Statement

Hi guys, I'm trying to start from scratch on figuring out the projectile motion problem. But I think I've hit a roadblock. I am trying to solve a problem where I gave myself initial velocity and how far the object travels, but I can't seem to find a way to solve this without knowing the angle that the object was fired at.

Homework Equations

The Attempt at a Solution

I've been scribbling away at this for about an hour and I don't think I've really gotten anywhere.

 

[SHISHKABOB]

oops, nevermind, figured it out

I forgot some simple trig identities that helped me out