Half Angle Formulas - How to Use

Learn how to work with the Half Angle Formulas for sine, cosine, and tangent in this free math video tutorial by Mario's Math Tutoring. Timestamps: 00:00 Intro 0:06 Formulas for the Sine, Cosine, and Tangent Half Angle Formulas 0:48 Example 1 Sec(theta/2) 2:14 Visual Representation of the Half Angle 2:32 Example 2 Cot(Theta/2) 3:19 Example 3 Using the Cosine Half Angle Identity to Simplify 3:58 Example 4 Sine 112.5 4:36 Explanation of Whether Sine is Positive or Negative 6:08 Explanation of How the Formulas Give Us an Exact Answer 6:30 Example 5 Cos(3pi/8) Related Videos: Half Angle Formulas Positive or Negative? https://youtu.be/SYO5bKLS0YE Master the Unit Circle https://youtu.be/iHa8f7k4Tg8 * Organized List of My Video Lessons to Help You Raise Your Scores & Pass Your Class. Videos Arranged by Math Subject as well as by Chapter/Topic. (Bookmark the Link Below) http://www.mariosmathtutoring.com/free-math-videos.html ➡️JOIN the channel as a CHANNEL MEMBER at the "ADDITIONAL VIDEOS" level to get access to my math video courses(Algebra 1, Algebra 2/College Algebra, Geometry, and PreCalculus), midterm & final exam reviews, ACT and SAT prep videos and more! (Over 390+ videos) https://www.youtube.com/channel/UClOR1BiPyOkkIAnv9Cmj4iw/join