How can i calculate line of sight angle?(Solved)

When i set a target how can you find the Line-Of-Sight angle LOS (being the angle that you directly see the target from your position or in other words the line when you look you see the target directly ) according to the horizon and both the horizontal angle and the vertical angle?

Haha only a couple variables with pythagoras theorem and a little math to find vertical angle.
And horizontal angle angle is bearing and it can be obtained from lat long coordinates with the help of two argument inverse tangent. ( Atan2 )