# Kaleigh's question at Yahoo! Answers involving eliminating a parameter

Staff member

#### MarkFL

Staff member
Hello Kaleigh,

We are given the parametric equations:

$$\displaystyle x=\cos(t)$$

$$\displaystyle y=\sec(t)$$

One way we may eliminate the parameter $t$ is to multiply the two equations together, giving:

$$\displaystyle xy=1$$

We may choose to write this as:

$$\displaystyle y=\frac{1}{x}$$

To Kaleigh and any other guests viewing this topic, I invite and encourage you to post other parametric equations questions in our Pre-Calculus forum.

Best Regards,

Mark.