Recent content by neilparker62

  1. neilparker62

    It will highlight your solution as well as illustrate a treasure trove of underlying geometry...

    It will highlight your solution as well as illustrate a treasure trove of underlying geometry 'dug up' by AI. I will include an introductory paragraph saying I'm writing it as a reference example for the many contributions you have made on PF.
  2. neilparker62

    Ok - so what I was thinking of doing is writing a short article on one of your many interesting...

    Ok - so what I was thinking of doing is writing a short article on one of your many interesting posts and subsequent threads. https://www.physicsforums.com/threa...riangle-given-some-extra-information.1063874/
  3. neilparker62

    Hi again. I don't think there is anything like an "official" pf letterhead since it's just a...

    Hi again. I don't think there is anything like an "official" pf letterhead since it's just a website. But you can check with @Greg Bernhardt on that one.
  4. neilparker62

    Hi. Did you get your reference from someone on PF ? I can write something like I see you...

    Hi. Did you get your reference from someone on PF ? I can write something like I see you regularly posting interesting Maths/geometry problems and contributing to discussions around those.
  5. neilparker62

    Doppler effect: why do I find this exercise so difficult?

    Thanks for the link.
  6. neilparker62

    Hi everyone

    I'm sure they don't and wouldn't worry much if they did! I wish I was more clued up on those particular topic areas but in all honesty I'm not.
  7. neilparker62

    Hi everyone

    Welcome to the PF community - I'm sure you'll find some expert advice on those topic areas (not that I personally know much about them!)
  8. neilparker62

    Paul Hinds has passed

    Deepest condolences - Robert to you and all the family. It's been an honour to share this forum with stalwarts such as your Dad. We'll hugely miss his always sage and thoughtful posts.
  9. neilparker62

    Praise 2024 Member Award Ceremony

    Seconded. And if I may put it this way - it's reward enough to be part of the PF community and (occasionally) to post something that others find useful/interesting . Or to start a thread which usually yields any number of useful responses.
  10. neilparker62

    Member and Mentor Appreciation Thread

    @PeroK . Stop complaining about AI - you're better by far!
  11. neilparker62

    Undergrad Trigonometry problem of interest

    Yes - as mentioned above the technique is strikingly similar to that employed in Diophantus II VIII which is "to divide a square into two other squares" - I take the liberty of copy/pasting the image from Wikipedia which illustrates the technique when the given square is 16. y=mx-4 is...
  12. neilparker62

    Undergrad Trigonometry problem of interest

    Perhaps worth noting (in retrospect) that you will get this equation directly by implementation of @GiorgioPastore 's suggestion in post #73. Very interesting discussion on parameterization of this problem. Am still trying to get my head round some of those posts! See also...
  13. neilparker62

    Undergrad Trigonometry problem of interest

    Definitely the most efficient solution!
  14. neilparker62

    Announcement RIP Vanadium 50

    Most of his posts were on topics way beyond my 'ken' but I will remember him as a very clued up 'no nonsense' physicist. Here's a very characteristic post from him - note the reaction from the OP: https://www.physicsforums.com/threads/best-rocket-stopping-method.1066619/post-7129301
  15. neilparker62

    Undergrad Trigonometry problem of interest

    or ##RL^2 = (2x)^2 - (2)^2 = 4x^2-4## We can also draw the other diagonal and apply Ptolemy directly: ##2x + 22x = \sqrt{4x^2-4}\times\sqrt{3x^2}=2x\sqrt{3x^2-3}## etc