# Math English Terms

English is a tough language. Native speakers have trouble getting good grades in it. This is meant to help smart #math people sound educated. It is not a complaint.

If you have *y*(*x*) and you want *d**y* / *d**x* you **differentiate** *y*(*x*). The result, *d**y* / *d**x*, is the **derivative** of *y*(*x*) with respect to *x*. Don't use the verb **derive** for this. The process of taking the **derivative** is called differentiation.

If you have a geometric figure and you want to obtain a formula for the area of the figure, you **derive** the formula. The steps in obtaining the formula is the **derivation** of the formula.

The name of the function used in sin(*x*) is the **sine** function, not the **sinus** function.

The singular and plural of **series** is the same. The singular is not **serie**.