A branch of mathematics dealing with the relationships between the angles and sides of triangles.

त्रिकोणमिति

English Usage: "In high school, I struggled with trigonometry and its complex equations."

Hindi Usage: "हाई स्कूल में, मैंने त्रिकोणमिति और इसके जटिल समीकरणों से संघर्ष किया था।"