SU1166139A1 - Device for determining values of trigonometric functions - Google Patents

Abstract

DEVICE FOR DETERMINATION THREE. GONSMETRIC FUNCTIONS, containing a fixed plate, in which a sectorial degree is performed. the scale and parallel to one of the hundred (the rectangular cutout is the first rectangular cutout along which the cosine scale is applied, and the slider, which is applied to the sine scale, perpendicular to the cosine scale, which has that, in order to expand the functionality by defining the tangent and cotangent functions and increasing the computational performance, the slider made a rectangular sector notch and, in the fixed plate, mutually perpendicular second The first and third rectangular points, one of which is parallel to the first rectangular cut and has a cotangent scale, and the other one (L tangents, with the engine provided with indicators.

Description

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The invention relates to hand-operated computing devices and can be used to compute sin X, cos x, tg x and ctg X trigonometrically with an argument varying from 0 to 90. A known slide rule is capable of defining triometric functions and containing a body in the slots of which the engine is placed, and a slider with a line of sight j. However, this line allows only sin X and tg X to be calculated. The closest technical solution to the proposed one is an instrument for calculating trigonometric functions, containing a base plate, in which a pie cutout is provided, provided with a degree scale, and parallel to one of the sides. The first sector has a first rectangular cut-out along which a cosine noise scale is applied, a slider located on a fixed plate, a sinus scale is applied on it, and perpendicular to the cosine scale. A disadvantage of the prior art is limited functionality, since it can only determine the sine and cosine functions. The purpose of the invention is to expand the functional capabilities of the device by defining the functions of the tangent and t-tangent and increasing the computational performance. The goal is achieved by the fact that the device for determining trigonometric functions contains a fixed plate, in which a sector cut is made with a degree scale and the first rectangular cut parallel to one side of the sector cut and along which the scale of cosines is located in the guides under the fixed plate the slider, on which the sine scale is applied, is perpendicular to the cosine scale, a rectangular sector notch is made in the slider, and in the fixed plate are mutually perpendicular second second and third rectangular recesses, one of which is located parallel to the first cut-out and a rectangular cotangents has a scale, and the other - the scale of the tangents, the engine is provided with pointers. FIG. 1 shows the device, a general view of FIG. 2 is the same side view, in FIG. 3 - engine construction. The device (Fig. 1) contains a fixed plate 1, in which a sector notch 2 is scaled by a scale 3 and rectangular cuts 4-6, along which scales 7–9 are drawn, corresponding to scales of cosines, tangents and contangents. The plates 1 are screwed to the plate 1 by the screws t1 (Fig. 2), in which the slider 12 moves. The slider 12 (Fig. 3) has a rectangular sector notch 13, as well as a scale of 14 sines and pointers 15 and 16. The device works as follows in a way. Moving slider 12 relative to plate 1, set the scale of 14 sines against the value of the specified angle on degree scale 3. The values of cos x and ctgx are compared against the corresponding indicators of the slider on scales 7 and 9, and the value of tgx is on scale 8 at its intersection with arc 13 For example, in FIG. 1 argument is established, with sin 30 ° 0.5, cos 30 ° 0.86, tg 30 ° 0.57, ctg 30 ° 1.7. The technical and economic efficiency of the proposed device is due to its wider functionality and higher computing performance.

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Claims (1)

DEVICE FOR DETERMINING THREE. TONOMETRIC FUNCTIONS, containing a fixed plate, in which a sector cut of a degree is made. scale and parallel to one of the hundred (the sector cutaway is the first rectangular cutout along which the cosine scale is applied, and an engine located in the guides under the fixed plate, on which the sine scale is applied, perpendicular to the cosine scale, characterized in that, in order to expand the functionality ¹ by determining the tangent and cotangent function and enhance computing performance in the engine is formed a rectangular recess sectored / and in the stationary plate - and second mutually perpendicular tert th rectangular recesses, one of which is located parallel to the first rectangular cutout cotangents and has a scale, and the other - the scale of the tangents, the engine is provided with pointers. 3 * 1166139 2