Math geometry Trigonometry Converting from Degrees to Radians via the Unit Circle. Pretty good visual for explaining how to convert between radians and degrees. You'll definitely need this in Trig, Math Analysis, PreCalculus etc.
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Have you ever wondered what the tangent function actually has to do with the tangent of a circle? I’ve seen this gif floating around the web a couple of times, but I’ve never actually understood it until today.
A prism will allow you to see the individual colors that comprise the source light. In this case, sunlight entering the prism is divided into the colors of a rainbow based upon the wavelength of each conponent.