| 例句 |
Trigonometry is a branch of mathematics.三角学是数学的分支学科。Algebra, arithmetic, calculus, geometry, and trigonometry are branches of mathematics.代数、算术、微积分、几何学和三角学都是数学的分支。Trigonometry concerns the functions of angles, such as sine, cosine, and tangent.三角学研究的是角的函数，例如正弦、余弦和正切。 |