useful info

[Steve Butler 1Participant @stevebutler1]

Hi all

I found this phamplet whilst looking throught my wife's grandads books and found it very usefull maybe it will be usefull to some of you out there

Steve

[Steve Butler 1Participant @stevebutler1]

Machinery’s Triangle Chart

[Ralph HParticipant @ralphh]

Printed out a copy, I think that may be very useful.

Thank you

Ralph

[John Stevenson 1Participant @johnstevenson1]

I have sent for a new one.

They are only tuppence

[Roy MParticipant @roym]

I hope you all realise that this chart only works if you use logarithms!

[RobboParticipant @robbo]

"They are only tuppence "

Plus 1½d postage.

[LimpetParticipant @limpet]

Posted by John Stevenson on 19/11/2015 18:17:49:

I have sent for a new one.

They are only tuppence

You're obviously forgetting the £4.00 postage or should it be £4.0s.0d John

[Speedy Builder5Participant @speedybuilder5]

I can't see it in Euston Road now !

**LINK**

BobH

[V8EngParticipant @v8eng]

I expect here is an APP to do the same thing now.

 

Edited By V8Eng on 19/11/2015 21:56:06

[Danny M2ZParticipant @dannym2z]

Posted by Steve Butler 1 on 19/11/2015 13:28:02:

Hi all

I found this phamplet whilst looking throught my wife's grandads books and found it very usefull maybe it will be usefull to some of you out there

That's a great find Steve, your wife's grandad was a preserver of special documents that would otherwise be lost forever. Thank's for sharing it here.

As for preserving things, here's something that I won back in 1986, it allows one to do the same trigonometry to a lot of decimal places and it's only on it's 3rd set of batteries in 29 years. HP11c. I love it; RPN and all the mathematical functions (I have a Polish background btw). Programmable of course, which was interesting in 1986.

* Danny M *

[norm nortonParticipant @normnorton75434]

Who remembers being taught SOHCAHTOA at school?

It gives you all the formulae for the right angle triangles in that chart.

Sine of angle=Opposite/Hypotenuse; Cosine of angle=Adjacent/Hypotenuse; Tan of angle=Opposite/Adjacent.

Norm

[mechman48Participant @mechman48]

Posted by norm norton on 20/11/2015 11:00:40:

Who remembers being taught SOHCAHTOA at school?

It gives you all the formulae for the right angle triangles in that chart.

Sine of angle=Opposite/Hypotenuse; Cosine of angle=Adjacent/Hypotenuse; Tan of angle=Opposite/Adjacent.

Norm

 

Now that brings back memories… logs, anti logs, … trigonometry, geometry, but, even being in the engineering business all my life, I honestly don't recall having to use, or the need for… quadratic equations, a right pain in the a**e that was

George.

 

Edited By mechman48 on 20/11/2015 11:21:19

[Brian WoodParticipant @brianwood45127]

In my school our maths teacher was known by the nickname Spanner Lee; so called for his habit of looking over your shoulder and telling you to 'tighten up little boy'

He taught us to chant Sinoppipe______cosadipe_____tanoppad. I don't think we ever had to spell them but I've never forgotten the chants.

Brian

[mark costello 1Participant @markcostello1]

I cannot do the math required. Free computer programs insure that I don't have to learn.

[mechman48Participant @mechman48]

Now I'm retired I have no need for any of that; if I do need any of that sort of info I have access to a simple app on my tablet called 'Triangle calc' or use the tables in my Zeus book…

George.

[Chris Evans 6Participant @chrisevans6]

I still have my log tables and slide rules from when I started as an apprentice toolmaker 52 years ago. We where taught to remember all the formular .

[Roy MParticipant @roym]

If it wasn't for calculators ,et al, there would be need for soduko.

[Howard LewisParticipant @howardlewis46836]

We were taught :

Some People Have (SINE = Perpendicular / Hypotenuse)

Curly Brown Hair (COSINE = Base / Hypotenuse)

'Til Painted Black (TANGENT = Perpendicular / Base)

This was from the days when we could work to two decimal places using a 10" Log/Log Slide rule, (Still have it!) but still holds true today.

Only understood a Slide Rule when shown that it was Log tables plotted out so that they could be moved relative to each other to add or subtract the readings.

Howard

Edited By Howard Lewis on 27/11/2015 22:38:55

[KWILParticipant @kwil]

Have not used my slide rule for years, but still find trig (etc) calcs useful to do at times and can still do them the "hard" way.

[Dinosaur EngineerParticipant @dinosaurengineer]

A simple 2D CAD app. can solve many trig calcs quite quickly.

[Bill PudneyParticipant @billpudney37759]

There is also a simple triangle program available to install on your PC or whatever…

We were taught ….

Some Officers Have (Sine=Opposite over Hypotenuse)

Curly Auburn Hair (Cos = Adjacent over Hypotenuse)

That Others Admire (Tan = Opposite over Adjacent)

So many ways to skin a cat!!

Danny, I still use a scientific Casio that I got in 1980!! It's been used a lot and never missed a beat!!

cheers

Bill

[Gary WoodingParticipant @garywooding25363]

I was taught…

Some People Have (Sine = Perpendicular over Hypotenuse)

Curly Black Hair (Cos = Base over Hypotenuse)

Though Partly Bald (Tan = Perpendicular over Base)

Funny how these things stick in your mind.

[Roderick JenkinsParticipant @roderickjenkins93242]

Posted by Gary Wooding on 28/11/2015

Funny how these things stick in your mind.

Certainly is:

OHMS – Opposite Over Hypotenuse Means Sine.

Rod

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