noun
trigonometric ratio
Mathematical term for the ratios of sides in a right triangle: sine, cosine, tangent, etc. Used in geometry and trigonometry.
三角比の基本は、サイン、コサイン、タンジェントです。
The basics of trigonometric ratios are sine, cosine, and tangent.
Compound of 三角 (triangle) and 比 (ratio). A straightforward modern mathematical term.