This video is about solving equations with half angle formulas.These formulas include angles which are half of an angle on the unit circle. Depending on which quadrants we are in, sine, cosine, and tangent can all either be positive and/or negative.
What should the reader pay attention to?
The reader should pay attention to the formulas used and why anything squared is always positive. Also, when given radians, you must convert to degrees and find a coterminal angle within 360 degrees, if necessary, before moving on to do anything else.
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