Homework is Worksheet 10.4 A & B.
Use the links below for videos and extra examples.
http://www.brightstorm.com/math/trigonometry/basic-trigonometry/trigonometric-ratios-tangent/
http://www.youtube.com/watch?v=D8OhcqgF0Gw
http://www.glencoe.com/sec/math/msmath/mac04/pdfs/mac_trig_ny.pdf