$P_{?}$

A SINE Bar is shown below. This device allows precise angular dimensions to be checked or machined. The distance between centers $($L$)$ is $5$ inches and the diameter of each rod $($labeled A and $B)$ is the same. The Height $(H)$ is $2\mathrm{.}425$ inches from the bottom of the top rod to the surface plate. Determine what the angle $($A$)$ is in terms of degrees and radians. A sketch is provided so none is required.