Actually, the T2 scale is the one going up to 84.3° (if you ignore the slight extensions). The S scale goes up to 90° (right index). Unfortunately, it is difficult to correctly read/set angles above 80° on S (which don't have tick marks) due to the more and more extreme distortion/compression in this interval. (If your slide rule has a P scale, usually available on European models, you can circumvent this flaw a bit.) Apart from that, the law of sines is a much more convenient task with a slide rule. 🙂 The Aristo 0969 Studiolog model has S scales both on the slide and on the base which even allows to apply the spherical law of sines or Snell's law just as easily. PS: Since tan(x)=1/tan(90°-x), the ST/SRT scale can be combined with CI/DI to determine the tangent of angles x between 84.3° and 90°: Set 90°-x on ST. If ST is on the base, read tan(x) on DI. If ST is on the slide, read on CI. (Basically, this approximates tan(x)~R/(90°-x) where R=180°/pi~57.3°.)
I noticed in the instructions for the 2/83N slide rule, they mention some kind of correction mark ( on the slide rule itself) to be used for small angles. But not too sure how that works. Anyone familiar with that?
Im looking at slide rules on Ebay and I notice that some are trig slide rules. Im wondering why they would make slide rules that just do trig. Dont regular slide rules have all the trig functions that a trig slide rule would have? Im just wondering if its worth picking up a trig slide rule for special functionality.
Pretty much all slide rules do the math functions. The ones that say trig are more marketing to emphasize it. The ones I recommend are the Pickett n3 and the aristo studio model 0968 for general use. They are powerful rules and cost $40-60
Actually, the T2 scale is the one going up to 84.3° (if you ignore the slight extensions).
The S scale goes up to 90° (right index). Unfortunately, it is difficult to correctly read/set angles above 80° on S (which don't have tick marks) due to the more and more extreme distortion/compression in this interval. (If your slide rule has a P scale, usually available on European models, you can circumvent this flaw a bit.) Apart from that, the law of sines is a much more convenient task with a slide rule. 🙂
The Aristo 0969 Studiolog model has S scales both on the slide and on the base which even allows to apply the spherical law of sines or Snell's law just as easily.
PS: Since tan(x)=1/tan(90°-x), the ST/SRT scale can be combined with CI/DI to determine the tangent of angles x between 84.3° and 90°:
Set 90°-x on ST. If ST is on the base, read tan(x) on DI. If ST is on the slide, read on CI. (Basically, this approximates tan(x)~R/(90°-x) where R=180°/pi~57.3°.)
Great points. As I said you get lost in the weeds after about 84.3 except for 90
Very nice. I have got some computer, like you.
I have 2 with the linear scale, witch allow To compute in dB. And one To drive an airplane .
I love that object. Hî.
I noticed in the instructions for the 2/83N slide rule, they mention some kind of correction mark ( on the slide rule itself) to be used for small angles. But not too sure how that works. Anyone familiar with that?
I will look. They are for min and sec of arc
Im looking at slide rules on Ebay and I notice that some are trig slide rules. Im wondering why they would make slide rules that just do trig. Dont regular slide rules have all the trig functions that a trig slide rule would have? Im just wondering if its worth picking up a trig slide rule for special functionality.
Pretty much all slide rules do the math functions. The ones that say trig are more marketing to emphasize it. The ones I recommend are the Pickett n3 and the aristo studio model 0968 for general use. They are powerful rules and cost $40-60
@@sliderulesandmathematics9232 thanks, much appreciated, you just saved me from an unnecessary purchase
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