The branch of mathematics that deals with figures on the surface of a sphere and the relationships between angles and distances on that surface.

गोल त्रिकोणमिति

English Usage: "In advanced physics, spherical trigonometry is essential for calculating the positions of stars."

Hindi Usage: "उन्नत भौतिकी में, गोल त्रिकोणमिति तारों के स्थान की गणना के लिए आवश्यक है।"