## Preface To All

¶Precalculus is taught at Mt. Hood Community College over two 10-week courses. This text aims to address all learning outcomes from the first course, suitable for use in a single 10-week term.

##### HTML and PDF.

This text will be released with several synchronous versions that offer different features. The essential content of each version is the same as for all others.

Currently, a preview of the web version is available at

`https://www.mhcc.edu/precalc1/`

. The web version offers full walk-through solutions to most exercises, as well as interactive elements and easier navigation than print versions.

##### Copying Content.

Mathematical content can be copied from the HTML version. To copy math content into MS Word, `right-click`

or `control-click`

over the math content, and click to `Show Math As MathML Code`

. Then `Copy`

the resulting code, and `Paste Special`

into Word. In the Paste Special menu, paste it as `Unformatted Text`

. To copy math content into LaTeX source, `right-click`

or `control-click`

over the math content, and click to `Show Math As TeX Commands`

.

##### Accessibility.

The HTML version is intended to meet or exceed all web accessibility standards. If you encounter an accessibility issue, please report it to the editor.

All graphs and images should have meaningful alt text that communicates what a sighted person would see, without necessarily giving away anything that is intended to be deduced from the image.

All math content is rendered using MathJax. MathJax has a contextual menu that can be accessed in several ways, depending on what operating system and browser you are using. The most common way is to

`right-click`

or`control-click`

on some piece of math content.In the MathJax contextual menu, you may set options for triggering a zoom effect on math content, and also by what factor the zoom will be.

If you change the MathJax renderer to MathML, then a screen reader will generally have success verbalizing the math content.

##### Tablets and Smartphones.

PreTeXt documents like this text are “mobile-friendly”. The display adapts to whatever screen size or window size you are using. A math teacher will always recommend that you do not study from the small screen on a phone, but if it's necessary, this text gives you that option.