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A teaching device and sine function technology, which are applied in the field of mathematical function teaching devices, can solve the problems of high learning difficulty and complex sine function teaching devices, and achieve the effects of convenient operation, suitable for popularization and use, and simple structure.
Inactive Publication Date: 2018-10-12
CHANGZHOU COLLEGE OF INFORMATION TECH
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Problems solved by technology
It is difficult to learn the corresponding relationship between the angle x of the sine function and the sine value y, and the sine function teaching device in the prior art is relatively complicated
Method used
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Embodiment 1
[0022] see figure 1 , the present invention provides a sine function teaching device, which includes a scale plate 10 , a swivel 20 and an elastic member 30 .
[0023] The scale plate 10 is a circular plate, and the angle mark is provided on the scale plate 10. The scale plate 10 takes the center of the circular plate as the origin, the horizontal line passing through the origin is the X axis, and the vertical line passing through the origin is the Y axis. The angle between the axis and the Y axis is 90 degrees, the scale plate 10 is provided with a scale line along the Y axis direction, and the scale from the origin to the edge of the scale plate 10 is a numerical value 1, and the origin of the scale plate 10 is provided with a rotation axis (not shown in the figure) show).
[0024] The scale plate 10 is connected with a baffle plate 11, the baffle plate 11 is a rectangular plate, a gap is provided between the baffle plate 11 and the scale plate 10, the bottom of the baffle ...
Embodiment 2
[0032] see image 3 , the present invention provides a sine function teaching device, which includes a scale plate 10 , a swivel 20 and a scale 40 .
[0033] The scale plate 10 is a circular plate, the center of the scale plate 10 is the origin, the scale plate 10 is the reference point with the origin, the horizontal line passing the origin is the X axis, the vertical line passing the origin is the Y axis, and the X axis and The scale plate 10 between the Y axes is provided with angle marks, the angle between the X axis and the Y axis is 90 degrees, and the origin of the scale plate 10 is provided with a rotation axis (not shown).
[0034] The scale plate 10 is connected with a baffle plate 11, the baffle plate 11 is a rectangular plate, a gap is provided between the baffle plate 11 and the scale plate 10, the bottom of the baffle plate 11 is at the same level as the bottom of the scale plate 10, and the top of the baffle plate 11 After passing through the origin of the scal...
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Abstract
The invention discloses a sine function teaching device. The sine function teaching device comprises a scale plate and a rotating ring,wherein angle marks are arranged on the scale plate; a rotating shaft is arranged on the scale plate; the rotating ring is rotatably connected with the rotating shaft; the scale plate is connected with a baffle plate; an elastic piece is also arranged between the rotating ring and the baffle plate,one end of the elastic piece is fixedly connected with the rotating ring,and the other end of the elastic piece is slidably connected in a sliding groove. According to the invention,the elastic piece or a graduated scale is arranged between the rotating ring and the baffle plate,when the rotating ring rotates according to the angle marks on the scale plate,the length value of the elastic piece or the value of the graduated scale on the top part of the baffle plate is of the sine function value,the sine function value changes accordingly,the corresponding relation between the angle and the sine function value is demonstrated,the understanding of the corresponding relation between the angle and the sine function value for the students is strengthened,the structure is simple,the operation is convenient,and the method is suitable for popularization and use.
Description
technical field [0001] The invention relates to the field of mathematical function teaching devices, in particular to a sine function teaching device. Background technique [0002] In the process of mathematics teaching, trigonometric functions are the most basic knowledge of teaching, especially the sine function is the most widely used. In a right triangle, the ratio of the opposite side to the hypotenuse of any acute angle is called the sine sin of the angle. The definition of the sine function is: for any angle x, it corresponds to the unique sine value sinx, so for any angle x, There is a unique and definite value sinx corresponding to it, and the function established according to this corresponding rule, expressed as y=sinx, is called the sine function. It is relatively difficult to learn the corresponding relationship between the angle x of the sine function and the sine value y, and the teaching device for the sine function in the prior art is relatively complicated...
Claims
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Application Information
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