About This Lesson
Solving using Trig Half Angle Identity 2A . In this video we learn how to solve trig values using the trig half angle identity. This is part of a series of videos computing using half angle identities. See Intro and parts A-F. Videos by Julie Harland organized at YourMathGal.com.
Half-angle identities are not introduced until Junior and/or Senior year in a Trigonometry or Precalculus class. There is no standard that specifically address half-angle and are usually covered in Precalculus which is not aligned to the common core. Great resource!