The Best of Teacher Entrepreneurs: FREE MATH LESSON - “Inequalities Hangman: Solve Multi-Step Inequalities Hangman Style”
Successful achievements of Radivoje Kašanin could be found in many fields: theory of differential equations, theory of complex functions, analysis, geometry, interpolation and approximation, mechanics, astronomy and geophysics and in each of mentioned fields of his work he published papers that were acknowledged.
The Basics of Trig: The 6 Functions Trig is founded on the ratio of the sides of a right triangle. Basically, each function represents a fraction of one sided over another. The three basic trig functions are the Sine, Cosine, and Tangent, which are routinely shortened to sin, cos, and tan, respectively. Those three functions each have a reciprocal function known as the Cosecant, Secant, and Cotangent, which are also shortened: csc, sec, cot.
EGYPTIAN GEOMETRY -The Rhind Papyrus (also called the Ahmes Papyrus) is named after the British collector, Rhind, who acquired it in 1858. It was copied by a scribe, Ahmes (or Ahmos), (~1650 BC) from another document written ~2000 BC, which, possibly in turn, was copied from a document from ~2650 BC (the time of Imhotep?). The Rhind Papyrus is located in the British Museum, and contains mathematics problems and solutions. All the problems below are translations. Rhind Papyrus 2/n table
Moscow Papyrus Problems 56&57 M.A.D. MOSCOW PAPYRUS was copied by an unknown scribe (~1850 BC). It was brought to Russia during the middle of the 19th century, and is located in the Museum of Fine Arts in Moscow, and contains mathematics problems (simple equations) and solutions. Problem 10 (translation) Problem 14 Problem 56 Problem 57 Problem 58 Problem 59 Problem 60
On the borders of Uganda and Zaire lies Lake Edward, a source of the Nile. Though the area is sparsely populated today, approximately 25,000 (update from 9,000) years ago by the shores of the lake lived a small community Ishango.- the second oldest mathematical object (the oldest is here) in Africa. Some say that the Ishango Bone is the oldest table of prime numbers. Marshack later concluded, on the basis of his microscopic examination, that it represented a six-month lunar calendar.