Trigonometry

Katie Gandolfo -

SOS Math has a couple of examples for each of their topics as well as a few practice problems with answers.

http://www.sosmath.com/trig/trig.html

 

Wolfram MathWorld covers topics from Algebra through college-level mathematics. The information is pretty high-level and is probably best for older students. 

http://mathworld.wolfram.com/

 

SparkNotes Math has notes about all levels of math, divided up by topic, complete with practice problems and solutions.

http://www.sparknotes.com/math/

 

MathisFun has links to many different topics broken down by grade level. There is also a link on this page about Common Core. This site does contain basic math topics.

http://www.mathsisfun.com/links/index.html

 

The last four chapters of this open source precalculus book are a great trig resource.

http://www.opentextbookstore.com/precalc/ 

 

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