You can use Google.com or go to YouTube to find many free tutorials, ebooks and other information
HippoCampus.org has many good Math and Science tutorials:
http://www.hippocampus.org/Elementary%20Algebra
HomeSchoolMath.net has many tutorials for Geometry, Algebra, Trigonometry and other math subjects:
www.homeschoolmath.net
This is a good website for learning Algebra:
http://www.wtamu.edu/academic/anns/mps/math/mathlab/
Algebra.com has many tutorials, tutors and solved problems for Algebra and other math subjects:
www.algebra.com/
Algebasics show step by step how to solve various Algebra problems:
http://www.algebasics.com/
Coolmath has various tutorials for Pre-Algebra, Algebra, Geometry, and etc.
www.coolmath.com/algebra/
AAAKnow.com is a good website for learning basic mathematics:
www.aaaknow.com/equ.htm
YouTube has videos for learning almost any subject or topic
Trigonometry
http://www.youtube.com/results?search_query=Trig&search_type=&aq=f
I hope this helps!