[conspire] Password permutations (was: Correction)

[paulz at ieee.org]

 I think we need to order some shirts, "No bad math, just bad math teachers!"
And compounding the situation is that in many schools, it's quite acceptable to say that you are not good at math.  

Just to be argumentative, there are a lot of other applications for trig besides calculating triangles.  

I am guessing that Texx had trig in high school.  There would be no reason for a HS curriculum to assume that students would be using trig primarily for AC circuit theory.  Heck, my HS didn't have any classes in electronics.
Anyway, for anyone thinking about learning a math subject, I highly recommend Kahn Acadamy.  IMO the presentations are clear and the cost is free!
I'd like to get opinions from anyone else who has tried KA.


    On Thursday, April 16, 2020, 2:20:26 PM PDT, Texx <texxgadget at gmail.com> wrote:  
 
 Not getting trig can KILL you in AC theory classes.I didnt get trig then, so I was trying to use pythagorean to do polar - rectangular conversion and obviously flunked the test.
The problem was that they started out with all this complicated junk and completely obfuscated the subject.
What they SHOULD have done and DIDNT, was to explain that trig is about arcs & angles.If you have 2 sides and an angle or 2 angles and a side, and you know WHICH sides & angles you have, you can reconstruct the triangle.To me, those 2 lines explain the whole subject most of the way.
I ended up completely learning math up to Calc in 2010 and i now totally get it.I havent taken another crack at Calc yet, though.


On Thu, Apr 16, 2020 at 1:58 AM Nick Moffitt <nick at zork.net> wrote:

On 15Apr2020 06:51pm (-0700), Deirdre Saoirse Moen wrote:
> However, my dad, who could do calc in his sleep (physicist), recommended I skip Trig as it was a waste of time. I believed him. Now, for him that was probably true, but for me, it was not true. 

I had a similar problem, where I took calculus twice but *neither* integrated trig properly.  I ended up near the end of my second attempt with a burning question in my head, so I finally took it to EFNet #math and asked there.  

The first answer came from someone who did not assume any knowledge on my part, and it began: "First, consider the unit circle, and a right triangle with one vertex at the center..." 

        https://78.media.tumblr.com/tumblr_m93533eyFU1qlfzwoo1_500.gif

I aced the exams after that, because after an evening of flipping through my textbook I found that there WAS a little chapter on the role of trigonometry in calculus.  I had taken trig under the name "pre-calculus" but even that class had left the actual POINT behind so early that we just performed recipe application by rote on abstract symbols.  I had to re-learn a full year of maths in a single weekend, but it happened at just the right moment to actually stick.

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-- 

R "Texx" Woodworth
Sysadmin, E-Postmaster, IT Molewhacker
"Face down, 9 edge 1st, roadkill on the information superdata highway..."
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