In any triangle, side lengths are proportional to sines of opposite angles. R is the circumradius.
Surveying — Calculating distances when angles are easier to measure.
Navigation — Ship positioning using lighthouse bearings.
Architecture — Triangular roof frame calculations.
Astronomy — Stellar distance measurements using parallax.
Forensics — Bullet trajectory reconstruction.
Geography — Mapping inaccessible terrain.
Aviation — Flight path planning around obstacles.
Search and rescue — Triangulating distress signal sources.
Artillery — Calculating firing solutions.
Satellite communication — Dish alignment calculations.
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