Approximation for the tangent of angles near 90°: 1. Subtract your input angle from 90° by using paper or doing it mentally. 2. Convert to radians by dividing by 57.3. 3. Take the reciprocal of the result by reading it off the CI scale.
Excellent slide rule video! Just came across my Dad's old slide rule from the sixties a versalog 1460 and have been struggling with it . Dad is gone now and this is one of the keepsakes that remained. I always wanted to understand it's use but the casio took hold so Thanks for the great videos I had to subscribe
... as a German Biologist - 1974 - Lab work in analytical Chemistry - 1 Student had a Texas Instruments Digital Calculator - 8 cute red ciphers - for 175 DM - a Fortune - he did NOT pass the Semester. Showing exuberantly his 8 Ciphers so proudly... we humble Pedestrians still had to use the Slide Rulers - which FORCED to THINK!!! Plausibility! Dimension! We ALL passed the Semester well... Last Year I bought 2 Aristo Slide Rulers in perfect condition - from a retired German Engineer... for 5 Euro for both. I will build an Egyptian Pyramid to preserve those Mind treasures for future Archaeologists - in case some Humans may survive the NOAH Event we create with our hyper technology and dumbest ignorance in self destruction... the trick is to preserve them - without any manual and instruction. Let them find out - ....
Nice video and tutorial. Regarding roots and the LL scale... I use the C Scale to divide instead of the CI scale to multiply. Same results of course. Slide rule gave me a feel for math in high school more so than calculators. I have a TI 84, but still enjoy picking up my rule now and then. As a teacher giving a math problem, the question I get with calculators is "what button do I push first?"
Do you know how to get around not having A B scales or why they are frequently left off? I'm very amateur in my "slide-ruling" but I find those are often left off. I'm sure it's because the calculations can be done in another way, but I don't know what that is.
Hello there. I have been into slide rule for awhile and has research it for that long. Can you suggest some slide rule should I buy, as I am a highschool student and would use it for scientific calculations, like rooting, power, log, sin,...? Thank you very much!
I used a bamboo post in college. I loved it because the bamboo exudes the tiniest bit of oil to keep the rule lubricated. I also had a chep plastic rule and it was forever "grabbing". IOW, it was harder to set an exact value because the slide would "stutter" as the plastic grabbed against itself. I lubricated it with some talcum baby powder but that got to be a bit messy. I much prefered bamboo. Now some will squak that wood of any kind is problematic because it expands and contracts with humidity. Bamboo does not do that so much as other woods and it seemd to work well enough. In any case, if you want high accuracy you don't want a slide rule in the first place. That is not what they are for.
Neat! Most of this I knew, but now I finally understand what the .D and .0D inscriptions mean!! Not to mention having a slightly better grasp of those DFm and CFm scales. Many thanks.
I just recently bought a Keuffel & Esser slide rule, but the S scale on mine doesn't look like yours. Mine starts at what looks like 36', and ends at about 75 degrees. Using your system, the sine of 37 degrees on my slide rule is 0.7775 (I guess?). And, since it doesn't go up to 90 degrees, I don't know how I would calculate the sines or cosines of any angle between 75 and 90 degrees.
Approximation for the tangent of angles near 90°:
1. Subtract your input angle from 90° by using paper or doing it mentally.
2. Convert to radians by dividing by 57.3.
3. Take the reciprocal of the result by reading it off the CI scale.
Excellent slide rule video! Just came across my Dad's old slide rule from the sixties a versalog 1460 and have been struggling with it . Dad is gone now and this is one of the keepsakes that remained. I always wanted to understand it's use but the casio took hold so Thanks for the great videos I had to subscribe
For those who dont have upper T you can use tan(90-theta) = 1/tan(theta)
... as a German Biologist - 1974 - Lab work in analytical Chemistry - 1 Student had a Texas Instruments Digital Calculator - 8 cute red ciphers - for 175 DM - a Fortune - he did NOT pass the Semester. Showing exuberantly his 8 Ciphers so proudly... we humble Pedestrians still had to use the Slide Rulers - which FORCED to THINK!!! Plausibility! Dimension! We ALL passed the Semester well... Last Year I bought 2 Aristo Slide Rulers in perfect condition - from a retired German Engineer... for 5 Euro for both. I will build an Egyptian Pyramid to preserve those Mind treasures for future Archaeologists - in case some Humans may survive the NOAH Event we create with our hyper technology and dumbest ignorance in self destruction... the trick is to preserve them - without any manual and instruction. Let them find out - ....
Haha! A mischievous evil genius... but what if some other primate finds it first... Planet of the Apes? Forget Bitcoin, I'm investing in bananas.
Nice video and tutorial. Regarding roots and the LL scale... I use the C Scale to divide instead of the CI scale to multiply. Same results of course. Slide rule gave me a feel for math in high school more so than calculators. I have a TI 84, but still enjoy picking up my rule now and then. As a teacher giving a math problem, the question I get with calculators is "what button do I push first?"
Do you know how to get around not having A B scales or why they are frequently left off? I'm very amateur in my "slide-ruling" but I find those are often left off. I'm sure it's because the calculations can be done in another way, but I don't know what that is.
AVENDRE: J'ai 140 règles de calcul tout neuf N°57/88-Reitz-N-Etudiant & N°57/89-ETUDIANT LOG LOG.Fabrication allemagne en 1965.
12,5 cm version always in the pocket of every engineer.
Hello there.
I have been into slide rule for awhile and has research it for that long.
Can you suggest some slide rule should I buy, as I am a highschool student and would use it for scientific calculations, like rooting, power, log, sin,...?
Thank you very much!
pick up a post versalog on ebay. great quality.
I used a bamboo post in college. I loved it because the bamboo exudes the tiniest bit of oil to keep the rule lubricated. I also had a chep plastic rule and it was forever "grabbing". IOW, it was harder to set an exact value because the slide would "stutter" as the plastic grabbed against itself. I lubricated it with some talcum baby powder but that got to be a bit messy. I much prefered bamboo. Now some will squak that wood of any kind is problematic because it expands and contracts with humidity. Bamboo does not do that so much as other woods and it seemd to work well enough. In any case, if you want high accuracy you don't want a slide rule in the first place. That is not what they are for.
Neat! Most of this I knew, but now I finally understand what the .D and .0D inscriptions mean!! Not to mention having a slightly better grasp of those DFm and CFm scales. Many thanks.
Without an A and B scale, how does it compute roots?
Great effort; but your poor focus totally confused me. TD
My eyes hurt trying to FOCUS on this video
I just recently bought a Keuffel & Esser slide rule, but the S scale on mine doesn't look like yours. Mine starts at what looks like 36', and ends at about 75 degrees. Using your system, the sine of 37 degrees on my slide rule is 0.7775 (I guess?). And, since it doesn't go up to 90 degrees, I don't know how I would calculate the sines or cosines of any angle between 75 and 90 degrees.
Can you do another best of the pencil case
Omg so complicated. Nice video, though. Thanks for sharing.
I think it gets easier with practice. I have been playing around with an old K&E Log Log Decitrig, and it makes a lot of sense after some practice.
Which slide rule is better the Faber Castell 52/82 or the other one from the USA. I am thinking about buying the Faber Castell 52/82
Yea, yea...
Blame it on the camera...
;-)
It’s like black magic.