CK-12 Trigonometry
2011 January 29
CK-twelve Trigonometry
CK-twelve Foundation trigonometry flex e-book is an introduction into trigonometry for higher school college students. Topics incorporate: Trigonometric Identities and Equations, Circular Functions and Equations and Polar complex numbers.
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A Decent Free Trigonometry Textbook,
This is a very approachable and well presented introductory text on Trigonometry. It is written with a high school student in mind, but it can be used by anyone who is unfamiliar with this subject. It covers all the traditional topics in a trigonometry course – functions, triangles, angles, etc. The material is presented in a very straightforward manner and it is very easy to follow. There are multiple worked-out examples throughout the text, and each section ends with a several problems and their solutions. The problems vary in difficulty, and many are designed with practical applications in mind. The book also emphasizes the use of scientific calculator in working out of many problems, which is pedagogically a good approach. This book is available under the Creative Commons License through the CK-12 foundation, which means it can be reprinted, modified and resold if necessary.
The Kindle formatting of this textbook leaves something to be desired. The book was originally typeset in LaTeX, and this did not translate all that smoothly into the Kindle format. I’ve found that getting this textbook on other e-readers or computers in the epub format rendered it much more satisfactorily.
This is not the flashiest textbook that you will come across, but in my opinion it gets the job done.
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|An excellent free Trigonometry textbook,
The ck12.org foundation has made more than a dozen free math and science textbooks available, and this geometry textbook is one of them.
There are full images in this. This book is much larger than what is typically available for free. The images look good, but they are typically roughly two times too large at the moment. Also, all places where TeX is used, a too-large blocky image is used instead. For example, “(3,3)” is presented three times larger than the surrounding text. There are many of these on every page. In this particular ebook, it’s inconsistently sized. For example, see location 4561-71.
Not all images seem to have made it. For example, on location 4513-28, three images are listed as “not available”. Since this is a digital textbook, I’m sure those will be fixed. The errors above will also probably be addressed quickly.
Despite the above mentioned (and perhaps soon-fixed) flaws, this is worthwhile download.
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