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Trigonometry: Identities By MathTV More at http://www.MathTV.com Tags: identities, mathtv, mckeague, trigonometry 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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How Islamic Inventors Changed The World - Part 3 - [Contribution Of Muslims Series] By returnofthekhera PLEASE CLICK "HQ" TO VIEW A CLEARER VERSION OF THIS VIDEO. In this video I will go over five things invented by Muslims. Please watch Part 1 & 2 first and look out for part 4. From coffee to cheques and the three-course meal, the Muslim world has given us many innovations that we take for granted in daily life. As a new exhibition opens, Paul Vallely nominates 20 of the most influential- and identifies the men of genius behind them 11] The windmill was invented in 634 for a Persian caliph and was used to grind corn and draw up water for irrigation. In the vast deserts of Arabia, when the seasonal streams ran dry, the only source of power was the wind which blew steadily from one direction for months. Mills had six or 12 sails covered in fabric or palm leaves. It was 500 years before the first windmill was seen in Europe. 12] The technique of inoculation was not invented by Jenner and Pasteur but was devised in the Muslim world and brought to Europe from Turkey by the wife of the English ambassador to Istanbul in 1724. Children in Turkey were vaccinated with cowpox to fight the deadly smallpox at least 50 years before the West discovered it. 13] The fountain pen was invented for the Sultan of Egypt in 953 after he demanded a pen which would not stain his hands or clothes. It held ink in a reservoir and, as with modern pens, fed ink to the nib by a combination of gravity and capillary action. 14] The system of numbering in use all round the world is probably Indian in origin but the style of the numerals is Arabic and first appears in print in the work of the Muslim mathematicians al-Khwarizmi and al-Kindi around 825. Algebra was named after al-Khwarizmi's book, Al-Jabr wa-al-Muqabilah, much of whose contents are still in use. The work of Muslim maths scholars was imported into Europe 300 years later by the Italian mathematician Fibonacci. Algorithms and much of the theory of trigonometry came from the Muslim world. And Al-Kindi's discovery of frequency analysis rendered all the codes of the ancient world soluble and created the basis of modern cryptology. 15] Ali ibn Nafi, known by his nickname of Ziryab (Blackbird) came from Iraq to Cordoba in the 9th century and brought with him the concept of the three-course meal - soup, followed by fish or meat, then fruit and nuts. He also introduced crystal glasses (which had been invented after experiments with rock crystal by Abbas ibn Firnas - see No 4). Check out http://www.independent.co.uk/news/sci... for the article. Please rate, comment and subscribe! Look out for part 3 insha'Allah! returnofthekhera Tags: algorithm, allah, contribution, east, experiments, fountain, inoculation, islam, islam's, middle, muhammad, numbering, pbuh, pen, trigonometry, truth, windmill 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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A Trick to Remember Values on The Unit Circle By patrickJMT A Trick to Remember Values on The Unit Circle - People often forget what x,y coordinates on the unit circle go with what angle. In this video, I show a little 'trick' to remember the values on the unit circle in the first quadrant. For more free math videos visit http://JustMathTutoring.com Tags: calculus, circle, degrees, examples, justmathtutoring.com, pi, precalculus, radians, trigonometry, unit 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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Unit Circle (Cheat) "Trig Table" For: Trigonometry/Pre-calculus/Calculus By CKAudioUSA A good friend taught me how to use this chart. Understanding this method and remembering how to write it out improved my skills greatly. Hopefully you can benefit from this as well! Good Luck! Chris. Example: Look at the Chart: When the Cosine is V2/2 ; The angle would be pie/4 and it's Tangent at that angle is 1. You could also see that it's a 45 degree angle with a Sine of V2/2. [* V = Square root] Tags: ..., calc, calculus, chart, cheat, circle, conversion, cos, cosine, diagram, easy, example, pre, sheet, sin, sine, table, tan, tangent, trig, trigonometry, unit 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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Basic Trigonometry II By khanacademy Another example of figuring out the sine, cosine, and tangent of an angle in a right triangle Tags: cosine, khan, sine, tangent, trigonometry 1 Downloads - Last from: http://downthisvideo.com (Your Blog here!) |
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Basic Trigonometry By khanacademy An introduction to trigonometric functions: sine, cosine, and tangent. Tags: khan, math, precalculus, trig, trigonometry 2 Downloads - Last from: http://downthisvideo.com (Your Blog here!) |
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Radians and degrees By khanacademy What a radian is. Converting radians to degrees and vice versa. Tags: degree, khan, math, radian, trigonometry 2 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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Funciones trigonometricas - asesoriasdematematicas.com By asesoriasdematecom Se muestra una explicación breve de las Funciones trigonometricas en un triángulo rectángulo. Visita http://asesoriasdematematicas.com/pre..., aquí encontrarás más videos gratuitos. Tags: andalon, asesorias de matematicas, asesoriasdematematicas, circular, coseno, cosine, exercises, functions, jose, law, mate, math, quebrado, rectangular, seno, sine, tangente, triangle, trigonometric, trigonometry 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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Derivatives (part 8) By khanacademy Why the quotient rule is the same thing as the product rule. Introduction to the derivative of e^x, ln x, sin x, cos x, and tan x Tags: academy, calculus, derivatives, khan, trigonometry 1 Downloads - Last from: http://downthisvideo.com/ (Your Blog here!) |
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