Trigonometry: Angles in the 4th Quadrant

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How to find the trig values of angles in the 4th quadrant. Example. -390 degrees. I thank pilot capt. Stefano for his clockwise flight demos.

Pre-req: Trigonometry Lessons Part 1: Definitions
https://youtu.be/0UM5xzerIC0

https://sites.google.com/site/pianoandmathtutorials/math-tutorials



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Tags:
Angle (Dimension)
Trigonometry (Field Of Study)
Mathematics (Field Of Study)
sin
cos
tan
cot
sec
csc
introduction to trigonometry
first lesson in trigonometry
basic trigonometry
bbdhrggl
basics of trigonometry
UML
University of Massachusetts lowell
Jane Tang Grossman
obtuse angles
negative angles
clockwise direction
-390 degrees
4th quadrant angles