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West Asian mathematics – history of math

By |2018-05-10T10:12:08+00:00September 16th, 2017|Science, West Asia|

History of math: Sumerian multiplication table (2700 BC) Cuneiform multiplication table Once people in West Asia figured out how to write down numbers, about 3500 BC, they quickly began to want to use cuneiform to write down other mathematical ideas. (Read more about the invention of numbers) The earliest example of this that we have is from about 2700 BC. It [...]

Tangents – trigonometry – math

By |2018-04-11T09:30:18+00:00July 29th, 2017|Math|

Tangents: This line is tangent to a circle. What is a tangent? A tangent, like a sine or a cosine, is a mathematical way of thinking about a kind of movement that happens in nature. A tangent is really just a rephrasing of the same information we already had for calculating the sine function. Lines and circles [...]

Cosine – Trigonometry – Math

By |2017-07-29T17:48:21+00:00July 29th, 2017|Math|

Right triangle and cosine A cosine, like a sine, is a mathematical way of thinking about a kind of movement that happens in nature. A cosine is really just a rephrasing of the same information we already had for calculating the sine function. One way to describe these changes is with the sine function. Choose [...]

Invention of Zero – Indian Numbers – History of Mathematics

By |2018-09-19T20:53:13+00:00July 22nd, 2017|India, Math|

History of Math: Counting tokens from Mehrgarh in Late Stone Age India Indian counting tokens and base 10 The first Indian numbers appeared in the late Stone Age, about 4000 BC. Around this time, people at Mehrgarh began to use counting tokens. (People were already using these tokens in West Asia.) Where was Mehrgahr? Indian history articles Writing [...]

Who was Hipparchus? Greek astronomy

By |2018-04-23T14:14:54+00:00July 18th, 2017|Greeks, History, Science|

Antikythera mechanism: a clockwork machine to calculate how the earth and the sun move around Hipparchus was a Greek astronomer and mathematician. He used trigonometry to calculate how far away the moon was from the earth. And he worked on the problem of whether the earth went around the sun or the sun went around the earth. Hipparchus was born about 190 BC in Nicaea (now in Turkey), [...]