Finding launch angle given velocity components of 40 m/s and 50 m/s

[bin-bin]

Homework Statement

a football is kicked at a certain angle above the horizontal. the vertical component of its initial velocity is 40 m/s and the horizontal component is 50 m/s.

Homework Equations

what is the angle in the problem? what kind of formula can i use?

 

[lewando]

You are given 2 vectors. Graph them. Add them (head-to-tail method). Use elementary trigonometry to find angle.