The Flavor Connection [Interactive]

10 Secret Trig Functions Your Math Teachers Never Taught You | Roots of Unity On Monday, the Onion reported that the “Nation’s math teachers introduce 27 new trig functions.” It’s a funny read. The gamsin, negtan, and cosvnx from the Onion article are fictional, but the piece has a kernel of truth: there are 10 secret trig functions you’ve never heard of, and they have delightful names like “haversine” and “exsecant.” A diagram with a unit circle and more trig functions than you can shake a stick at. Whether you want to torture students with them or drop them into conversation to make yourself sound erudite and/or insufferable, here are the definitions of all the “lost trig functions” I found in my exhaustive research of original historical texts Wikipedia told me about. I must admit I was a bit disappointed when I looked these up. Numberphile recently posted a video about Log Tables, which explains how people used logarithms to multiply big numbers in the dark pre-calculator days. The secret trig functions, like logarithms, made computations easier.

Blow to multiple human species idea 17 October 2013Last updated at 14:03 ET By Melissa Hogenboom Science reporter, BBC News The 1.8 million-year-old skull is the most complete hominid skull ever found The idea that there were several different human species walking the Earth two million years ago has been dealt a blow. Instead, scientists say early human fossils found in Africa and Eurasia may have been part of the same species. Writing in the journal Science, the team says that Homo habilis, Homo rudolfensis and Homo erectus are all part of a single evolving lineage that led to modern humans. But others in the field reject this. A team looked at the most complete hominid skull ever found, which was uncovered in Dmanisi, Georgia. It had a small braincase, large teeth and a long face, characteristics it shares with H. habilis. The 1.8-million-year old skull comes from a site that has given up the biggest collection of well-preserved early-human remains known anywhere in the world. The skull had a very small braincase

40 more maps that explain the world Maps seemed to be everywhere in 2013, a trend I like to think we encouraged along with August's 40 maps that explain the world. Maps can be a remarkably powerful tool for understanding the world and how it works, but they show only what you ask them to. You might consider this, then, a collection of maps meant to inspire your inner map nerd. I've searched far and wide for maps that can reveal and surprise and inform in ways that the daily headlines might not, with a careful eye for sourcing and detail. 1. Data source: Oak Ridge National Laboratory, World Bank. Those dots represent people: the brighter the dot, the more people. 2. Click to enlarge. Human beings first left Africa about 60,000 years ago in a series of waves that peopled the globe. 3. (Wikimedia commons) The Mongol conquests are difficult to fathom. 4. Click to enlarge. This map shows the Spanish and Portuguese empires at their height. 5. This map shows British, Dutch and Spanish shipping routes from 1750 to 1800. 6. 7. 8.

The Jute Industry: From Seed to Finished Cloth by T. Woodhouse and P. Kilgour - Full Text Free Book (Part 1/2) Part 1 out of 2 [Advertisement 1: David Bridge & Co., LTD.] [Advertisement 2: Chas. [Advertisement 3: Fairbairn, Lawson Combe Barbour, LTD.] [Advertisement 4: Robert Hall & Sons] [Advertisement 5: A. [Advertisement 6: Urquhart, Lindsay & Co., LTD.] [Advertisement 7: H. [Advertisement 8: White, Milne & Co.] [Advertisement 9: Thomas C. [Advertisement 10: Robert Stiven & Co.] [Advertisement 11: Pitman's Commodities and Industries Series(Book List)] [Advertisement 12: George Hattersley & Sons, LTD.,] The sub-title of this little volume indicates that practically all the processes involved in the cultivation of jute plants, the extraction of the fibre, and the transformation of the fibre into useful commodities, have been considered. March, 1921. [Advertisement 13: J. [Advertisement 14: James F. A glance into the records of the textile industries will reveal thefact that the jute fibre was practically unknown in these islands ahundred years ago. _Botanical and Physical Features of the Plant_.