Angle difference between two bearings: Difference between revisions

Find the angle which is the result of the subtraction '''b2 - b1''',   where '''b1''' and '''b2''' are the bearings.

<br>Input bearings are expressed in the range &nbsp; '''-180''' &nbsp; to &nbsp; '''+180''' &nbsp; degrees.

<br>The result&nbsp; is also expressed in the range &nbsp; '''-180''' &nbsp; to &nbsp; '''+180''' &nbsp; degrees.

::* 20 degrees ('''b1''') and 45 degrees ('''b2''')

::* -45 and 45

::* -85 and 90

::* -95 and 90

::* -45 and 125

::* -45 and 145

::* 29.4803 and -88.6381

::* -78.3251 and -159.036

;Optional extra: allow the input bearings to be any (finite) value.

::* -70099.74233810938 and 29840.67437876723

::* -165313.6666297357 and 33693.9894517456

::* 1174.8380510598456 and -154146.66490124757

::* 60175.77306795546 and 42213.07192354373