Worksheets

Review

Website Resources
Half Angle
http://www.cliffsnotes.com/study_guide/DoubleAngle-and-HalfAngle-Identities.topicArticleId-11658,articleId-11612.html  
Notes with Examples on Double & Half Angle

http://www.mathwords.com/h/half_angle_identities.htm      
List of the half angle formulas

http://colalg.math.csusb.edu/~devel/IT/main/m05_identities/src/s03_half-angles.html        Notes and Examples

http://www.intmath.com/analytic-trigonometry/4-half-angle-formulas.php        Examples with solutions

Double Angle
http://www.regentsprep.org/Regents/math/algtrig/ATT14/formulaprac.htm       
Practice Problems:  Sum and Difference, Double Angle, & Half Angle

http://www.cliffsnotes.com/study_guide/DoubleAngle-and-HalfAngle-Identities.topicArticleId-11658,articleId-11612.html  
Notes with Examples on Double & Half Angle

http://hotmath.com/hotmath_help/topics/double-angle-and-half-angle-identities.html   
Examples with step-by-step solutions

http://www.intmath.com/analytic-trigonometry/3-double-angle-formulas.php       
Notes, Examples, and Practice Problems with Solutions

Equations
http://tutorial.math.lamar.edu/Extras/AlgebraTrigReview/SolveTrigEqn.aspx       
Practice problems with solutions

http://www.sparknotes.com/math/trigonometry/trigonometricequations/section1.html   
Notes and examples worked out stet-by-step

http://www.regentsprep.org/Regents/math/algtrig/ATT10/trigequations.htm       
Notes on solving trig functions with colors and detailed steps

http://www.regentsprep.org/Regents/math/algtrig/ATT10/trigequations2.htm       
Methods for solving trig functions

http://www.sparknotes.com/math/trigonometry/trigonometricequations/section1.html      
Notes and two examples with step-by-step explanations