Slashdot Mirror

← Back to Stories (view on slashdot.org)

Trigonometry Redefined without Sines And Cosines

Posted by CowboyNeal on from the numbers-and-stuff dept.

Spy der Mann writes "Dr. Norman Wildberger, of the South Wales University, has redefined trigonometry without the use of sines, cosines, or tangents. In his book about Rational Trigonometry (sample PDF chapter), he explains that by replacing distance and angles with new concepts: quadrance, and spread, one can express trigonometric problems with simple algebra and fractional numbers. Is this the beginning of a new era for math?"

3 of 966 comments (clear)

  1. Better LInk by OzPeter · · Score: 1, Redundant

    DIVINE PROPORTIONS: Rational Trigonometry to Universal Geometry by N J Wildberger is a link to the advertisment for his upcoming book, which also has a PDF dowbload of the first chapter.

    --
    I am Slashdot. Are you Slashdot as well?
  2. Three words by DrXym · · Score: 0, Redundant
    SOH CAH TOA. SOH (Sine(x) = Opposite / Hypotenuse, Cos(x) = Adjacent / Hypotenuse, Tan(x) = Opposite / Adjacent where x is an angle of a right angled triangle)


    Remember them and trigonometry is a doddle.

  3. Re:No sines and cosines? by sconeu · · Score: 1, Redundant

    Your pun, while integral to the joke, seems rather derivative...

    --
    General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.