How do I find the inverse tangent of a line?

Question

I\'ve got a line (x1,y1) and (x2,y2). I\'d like to use tan inverse to find the angle of that line, how would I do so in java?

I\'d like to see what angle the line makes

Answer 1

The atan2 function helps solve this problem while avoiding boundary conditions such as division by zero.

Math.atan2(y2-y1, x2-x1)