JP3235745U - Trigonometric ruler - Google Patents
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- JP3235745U JP3235745U JP2021004197U JP2021004197U JP3235745U JP 3235745 U JP3235745 U JP 3235745U JP 2021004197 U JP2021004197 U JP 2021004197U JP 2021004197 U JP2021004197 U JP 2021004197U JP 3235745 U JP3235745 U JP 3235745U
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Abstract
【課題】三角関数値を関数表または電卓等に頼らず平版上でこれを行うことが出来る三角関数定規を提供する。
【解決手段】平版Ａ上に縦横等間隔の直行線Ｃａ、Ｃｂと単位長さの円弧線Ｂａ、Ｂｂとより構成され、単位長さの円弧線と、原点よりの角度を持った直線との交点の縦線との読みがｓｉｎの値となり、横線の読みがｃｏｓの値となる。ｔａｎはその角度の線と角度ゼロの円弧線位置の縦線の交点の読みがその値となる。
【選択図】図１
PROBLEM TO BE SOLVED: To provide a trigonometric function ruler capable of performing this on a flat plate without relying on a function table or a calculator for trigonometric function values.
SOLUTION: This is composed of orthogonal lines Ca and Cb having vertical and horizontal equal intervals on a flat plate A and arc lines Ba and Bb having a unit length, and an arc line having a unit length and a straight line having an angle from the origin. The reading of the intersection with the vertical line is the value of sin, and the reading of the horizontal line is the value of cos. The value of tan is the reading of the intersection of the line at that angle and the vertical line at the position of the arc line at zero angle.
[Selection diagram] Fig. 1
Description
三角関数計算をビジュアル的に平面版上で正弦（ｓｉｎ）余弦（ｃｏｓ）正接（ｔａｎ）の値を直接求める為のものである。The purpose is to visually obtain the values of sine (sin), cosine (cos), and tangent (tan) on the plane version of trigonometric function calculation.
平版上で単位円弧線と角度線との交点を読み取ることにより三角関数値を求めるものである。The trigonometric function value is obtained by reading the intersection of the unit arc line and the angle line on the flat plate.
現在、三角関数計算は関数表または関数計算付き電卓等により行っている。従ってこれを定規形式等の平面上で図形を読み取ることが出来るようにするものである。Currently, trigonometric functions are calculated using a function table or a calculator with function calculation. Therefore, this makes it possible to read a figure on a plane such as a ruler format.
単位長さの円弧線と、原点よりの角度を持った直線との交点の縦線との読みがｓｉｎの値となり、横線の読みがｃｏｓの値となる。ｔａｎはその角度の線と角度ゼロの円弧線位置の縦線の交点の読みがその値となる。The reading of the arc line of the unit length and the vertical line at the intersection of the straight line having an angle from the origin is the value of sin, and the reading of the horizontal line is the value of cos. The value of tan is the reading of the intersection of the line at that angle and the vertical line at the position of the arc line at zero angle.
プラスチック等の平面版上に等間隔に直行する縦横線と単位長さの円弧線よりなるもので版は透明でも不透明でも構わない。
また図に示したように角度線をカーソルとして付けることも可能である。
さらに、これは書籍等に印刷して教材としても使えるものである。The plate consists of vertical and horizontal lines perpendicular to equal intervals and an arc line of unit length on a flat plate such as plastic, and the plate may be transparent or opaque.
It is also possible to attach an angle line as a cursor as shown in the figure.
Furthermore, this can be printed on books and used as teaching materials.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021004197U JP3235745U (en) | 2021-10-05 | 2021-10-05 | Trigonometric ruler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021004197U JP3235745U (en) | 2021-10-05 | 2021-10-05 | Trigonometric ruler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3235745U true JP3235745U (en) | 2022-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021004197U Active JP3235745U (en) | 2021-10-05 | 2021-10-05 | Trigonometric ruler |
Country Status (1)
| Country | Link |
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| JP (1) | JP3235745U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007249926A (en) * | 2006-03-13 | 2007-09-27 | Masao Shimura | Ruler for calculation of trigonometric function |
-
2021
- 2021-10-05 JP JP2021004197U patent/JP3235745U/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007249926A (en) * | 2006-03-13 | 2007-09-27 | Masao Shimura | Ruler for calculation of trigonometric function |
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| Date | Code | Title | Description |
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| R150 | Certificate of patent or registration of utility model |
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