Formula:
The core principle of angle subtraction involves converting both angles into a common unit (like total seconds or decimal degrees), performing the subtraction, and then converting the result back to Degrees, Minutes, and Seconds (DMS).
Given Angle 1 (D1 M1 S1) and Angle 2 (D2 M2 S2):
- Convert Angle 1 to total seconds: T1 = (D1 × 3600) + (M1 × 60) + S1
- Convert Angle 2 to total seconds: T2 = (D2 × 3600) + (M2 × 60) + S2
- Result in total seconds: TResult = T1 - T2
- Convert TResult back to DResult MResult SResult. If TResult is negative, the degree component will be negative.