spherical law of cosines

The spherical law of cosines is a mathematical rule used to find distances or angles between points on a sphere, like Earth. It relates the angular distance between two points to their individual positions, based on their latitude and longitude. Essentially, it helps determine how far apart two locations are, or the angle between them, considering the Earth's curved surface. It's useful in navigation and geography, ensuring accurate calculations over large distances where flat map assumptions wouldn’t work well.