Cartesian coordinates
Cartesian coordinate systems, Cartesian coordinate planes, Cartesian coordinates
britannica.com
Cosine
law of cosines, trigonometry, two sides of a triangles, three sides of triangles, cosine theory, cosine theorm, cosine rule, property rights, necessary evil, tragedy of commons, Quadrant 4, tangents, negative cosines
Gematria
English Gematria, Hebrew Gematria, Jewish Gematria, numerology, sacred geometry, sacred Gematria, ancient Gematria, mathematics, numerical values, secret alphabets, 666, satanism, esotericism, esoterical, alchemy, alchemists
Riemann hypothesis
Holy grail of mathematics, mathematicians, most notorious unsolved problems
Spheres
hemispheres, atmospheres, C.S.A of a sphere is 4𝜋𝑟2 therefore C.S.A of a hemisphere is 2𝜋𝑟2.
mathcentral.uregina.ca
Trigonometry
trigonometric functions, trigonometry ratios, trigonometry equations
Vector analysis
Vector calculus, scalars, geometric quantities, vector functions, vector-valued functions