About This Lesson
In this video solve problems using Trig Half Angle Identity 2D. 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.
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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.