Sine, cosine, tangent

  • Degree Ceremony
    problem

    Degree ceremony

    Age
    16 to 18
    Challenge level
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    Can you find the sum of the squared sine values?

  • Coke machine
    problem

    Coke machine

    Age
    14 to 16
    Challenge level
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    The coke machine in college takes 50 pence pieces. It also takes a certain foreign coin of traditional design...
  • Making Maths: Clinometer
    page

    Making maths: clinometer

    You can use a clinometer to measure the height of tall things that you can't possibly reach to the top of, Make a clinometer and use it to help you estimate the heights of tall objects.
  • The History of Trigonometry- Part 1
    article

    The history of trigonometry- part 1

    The first of three articles on the History of Trigonometry. This takes us from the Egyptians to early work on trigonometry in China.
  • Muggles, Logo and Gradients
    article

    Muggles, Logo and gradients

    Logo helps us to understand gradients of lines and why Muggles Magic is not magic but mathematics. See the problem Muggles magic.

  • Why stop at Three by One
    article

    Why stop at three by one

    Beautiful mathematics. Two 18 year old students gave eight different proofs of one result then generalised it from the 3 by 1 case to the n by 1 case and proved the general result.

  • Round and round a circle
    interactivity

    Round and round a circle

    Age
    14 to 16
    Challenge level
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    Can you explain what is happening and account for the values being displayed?

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