All-round trigonometric function demonstrating and shape drawing instrument

Abstract

The invention discloses an all-round trigonometric function demonstrating and shape drawing instrument mainly composed of a support, a movable drawing board, a disk gear bank and a sliding-block linkage mechanism. A demonstrating device, a converting mechanism and a shape drawing mechanism are arranged on the support. The demonstrating device is connected with the shape drawing mechanism through a connection rope. The components are combined in different assembly modes. People just need to rotate a handle on a driving wheel, all the trigonometric function relationships such as the sine function relationship, the cosine function relationship, the tangent function relationship, the cotangent function relationship and the cosecant function relationship can be demonstrated visually, continuous accurate functional shapes can be drawn on a drawing board, a piece of paper and any fixed planes, compound-form trigonometric-function-like relationships such as the variable-period trigonometric-function-like relationship, the variable-amplitude trigonometric-function-like relationship and the variable-initial-phase trigonometric-function-like relationship can also be demonstrated by simply adjusting the structure and changing the connection mode, and corresponding shapes can also be drawn. The all-round trigonometric function demonstrating and shape drawing instrument is simple in structure, flexible in operation, convenient to use, wide in application range and low in cost and has complete functions.

Description

technical field [0001] The invention relates to a teaching instrument, which is a device for converting circular motion into orthogonal composite motion, in particular a trigonometric function all-round demonstration and image drawing instrument. Background technique [0002] With the development of education in our country and the rapid progress of science and technology, various disciplines are constantly developing to meet the growing needs of teaching and engineering. Trigonometric functions are an important part of mathematics, occupying a considerable proportion in middle and advanced mathematics. By visually demonstrating the relationship between functions and drawing corresponding images, it can not only reduce the teaching pressure of teachers, but also help students understand and comprehend. It is an important means to improve the teaching quality of trigonometric functions. Engineering and technical personnel often use trigonometric function curves when designin...

AI Technical Summary

Problems solved by technology

[0004] In summary, the device has the following deficiencies: the relationship between functions cannot be demonstrated, and all trigonometric functions cannot be drawn: sine function, cosine function, tangent function, cotangent function, secant function, cosecant function, for images containing amplitude and It is also difficult to draw function images in the form of cycles, especially not conducive to personal learning and quality improvement of students, and it is not easy to draw curves on a fixed plane or work site, low versatility and insufficient comprehensive functions

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