Given the diagram of [math]\triangle LMN[/math], find the measure of angle [math]L[/math] in radians.
[list=1] [*]Identify which values are equivalent to [math]a[/math], [math]b[/math], and [math]c[/math] in the Law of Cosines formula. [*]Substitute the known values into the Law of Cosines formula. [*]Solve the resulting equation for angle [math]L[/math]. [/list]