Evaluating Trigonometry Expressions with Half and Double Angles Pt1

In a 2 part video I work many examples of evaluating trigonometric expressions involving half and double angle identities. Evaluating Trigonometry Expressions with Half and Double Angles Pt2 https://www.youtube.com/watch?v=RCl4VGGQS-U Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage www.YouTube.com/Profrobbob