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"Analytic-Phi" for Math Nerds Trucker Hat
Qty:
colour
Yellow and Yellow
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About This Design
"Analytic-Phi" for Math Nerds Trucker Hat
Geometry is one of the most ancient branches of mathematics. The Greeks developed a new method called Co-ordinate geometry or Analytical geometry; which today is also called “Cartesian” after the name of Rene Decartes (1596-1665). In order to transform from rectangular Cartesian coordinates (x,y,z) to spherical ones, and back, use the following Algebraic formulas: x = rho cos(theta)sin(phi), y = rho sin(theta)sin(phi), z = rho cos(phi), rho = ±sqrt(x2+y2+z2), theta = arctan(y/x), phi = arccos(z/sqrt[x2+y2+z2]). The value of phi is usually chosen in the interval between 0 and Pi, inclusive. The sign of rho is determined by which of the values of the arctangent function is chosen. Head hurt yet?? LOL! You must not be a math nerd!!
Customer Reviews
4.8 out of 5 stars rating2.4K Total Reviews
2,359 Reviews
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By C.16 December 2013 • Verified Purchase
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My dad and I love the show Squidbillies, but now that I've moved out, we don't get to watch it together anymore. I figured this was the perfect gift for him on Christmas because we both think this is one of Early's funniest hats, and it has some sentimental value. Atleast, as much sentimental value as you can get with a hat that says "Booty Hunter" on it lol.
It's big enough so that it will fit my dad's big ol' head, but its nice that it also has straps in the back, so he could adjust it if needed. I haven't tried to wash it yet, but I'm hoping the print lasts. Overall, I know my dad is going to love it and I can't wait to give it to him for Christmas. The quality of the image is excellent. The colors are bright and pop out, and the words are legible.
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By P.10 June 2013 • Verified Purchase
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I wear this hat every day. All my friends keep asking where I get it from. Looks really good quality and fits perfect for me. Design was very well printed and looks even better then in a picture.
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By Leonardo W.11 July 2020 • Verified Purchase
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Soon as arrived I was happy with product
Great quality An fit great. It was actually better then expected great quality good value im very happy
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Other Info
Product ID: 148350699221029033
Created on 13/02/2011, 13:29
Rating: G
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