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- 09:00, 13 April 2022 0kelvin talk contribs created page Graphs of trigonometric functions (Created page with "==The sine and cosine waves== <div style="text-align: center;"> 500px (they aren't perfect sines or cosines because they were hand drawn) </div> '''Why are they waves?''' You need to understand the unit circle and how to read it. First, angles as we learn in euclidean geometry, are always in between 0° and 360°. That is, from zero to doing a full circle turn. Any angle beyond that is just multiples of full turns or partial turns. With negati...")