NEW for 2020 - We have recently expanded the precalculus section with hundreds more practice problems and several new pages as well as expanded discussion on many more pages.
There are lots and lots of online videos and websites to help you review and learn precalculus and college algebra. And you could waste a lot of time trying to find help.
So, how can you prepare for calculus and not waste time?
Use 17Calculus Precalculus
We have sorted through lots of videos and websites for you and organized everything you need. We build discussion around videos and provide lots of practice problems, ALL with worked out solutions (not just answers but complete, worked out in detail and explained solutions).
So, who is this site for? We built this site for the serious college student in math, engineering, science and/or business . . . pretty much any college student serious about learning precalculus, college algebra, algebra 2, analytic geometry or trigonometry. We also assume that you will be going on to calculus but this is not a requirement to learning from this site.
To get the most out of this site, you need a solid background in basic algebra and basic geometry. You also need some exposure to trigonometry, although we cover some of the basics.
So how much will this cost you? Nothing! All the material is free.
Ready to really UNDERSTAND precalculus? Okay, let's go.
To get started, select a topic from the menu.
Precalculus Books Recommendations
Here are a few books that we recommend from which to learn precalculus. For a complete list of books and to read about how to get the most out of your textbooks and supplementary books, go to our college books page.
Really UNDERSTAND Precalculus
Single Variable Calculus
Do you have a practice problem number but do not know on which page it is found? If so, enter the number below and click 'page' to go to the page on which it is found or click 'practice' to be taken to the practice problem.
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Help Keep 17Calculus Free
The 17Calculus and 17Precalculus iOS and Android apps are no longer available for download. If you are still using a previously downloaded app, your app will be available until the end of 2020, after which the information may no longer be available. However, do not despair. All the information (and more) is now available on 17calculus.com for free.