This might be what it looks like.
Since we're dealing with an angle, its opposite side and it's adjacent side, we use TANGENT.
[tex]tan(angle)= \frac{opposite}{adjacent} [/tex]
opposite=5
adjacent=2
By taking the angle, we use inverse.
[tex]angle= tan^{-1} \frac{5}{2} [/tex]
Then we can finally know the value by using your calculator. :)
