她觉得三角学比代数更有趣。

She finds trigonometry more interesting than algebra.

我需要为我的数学考试学习三角学。

I need to study trigonometry for my math exam.

毕达哥拉斯恒等式在三角学中被使用。

The pythagorean identity is used in trigonometry.

工程师经常在他们的计算中使用三角学。

Engineers often use trigonometry in their calculations.

毕达哥拉斯定理在三角学中是基础性的。

The theorem of Pythagoras is fundamental in trigonometry.

三角学对于理解波和振动是必不可少的。

Trigonometry is essential for understanding waves and oscillations.

在三角学中，余割函数通常缩写为csc。

In trigonometry, the cosecant function is often abbreviated as csc.

老师在今天的课上解释了三角学的基础知识。

The teacher explained the basics of trigonometry in today's class.

在三角学中，余弦定理用于求边的长度。

In trigonometry, the cosine rule is used to find the length of a side.

在三角学中，割线函数是余弦函数的倒数。

In trigonometry, the secant function is the reciprocal of the cosine.