Ruth in Canada Posted January 22, 2009 Share Posted January 22, 2009 We're using Foerster's Pre-Calculus and are happy with it. Every once in a while I wish I had another resource to use to help dd "get" a topic. For example, she has found the transition from (trig functions with theta as an argument) to (trig functions with x as an argument confusing.) I'm looking for a "purple math" equivalent for trig--or maybe some nifty on-line demos. Quote Link to comment Share on other sites More sharing options...
MaryM Posted January 22, 2009 Share Posted January 22, 2009 We found these Utube videos very helpful: http://www.khanacademy.org/videolibrary.jsp Just scroll down till you get to Trig. Mary Quote Link to comment Share on other sites More sharing options...
Jane in NC Posted January 22, 2009 Share Posted January 22, 2009 Ruth's post reminds me of "Trigonometry: The Easy Way", a book published by Barron's that does trig lessons within a fantasy novel. Anyone have any success with this as a supplement? In your case, Ruth, I wonder if it is as simple as picking up another text or two at your favorite charity shop or library used book sale. Sometimes an alternate presentation offers that magical phrase which makes a topic "click". Just a thought. Jane Quote Link to comment Share on other sites More sharing options...
periwinkle Posted January 23, 2009 Share Posted January 23, 2009 Ds occasionally used these sites: http://www.themathpage.com/aTrig/trigonometry.htm http://www.clarku.edu/~djoyce/trig/ Quote Link to comment Share on other sites More sharing options...
Catherine Posted January 23, 2009 Share Posted January 23, 2009 It's an online textbook with some great diagrams. It doesn't have problems sets, just explanations of concepts. http://en.wikibooks.org/wiki/Trigonometry Catherine Quote Link to comment Share on other sites More sharing options...
Kareni Posted January 23, 2009 Share Posted January 23, 2009 My husband who has tutored with Foerster's Precalculus suggests picking up a copy of Lial's Precalculus to use for supplementary explanations. He likes Foerster's but says that it goes at a very quick pace; Lial's has good explanations. Regards, Kareni Quote Link to comment Share on other sites More sharing options...
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