How to construct a function image with geometric artboard polar coordinates

In the study of function images, often in a Cartesian coordinate system, but in many cases, in the polar coordinate system also to study the function of the image. So, how to draw the function image with the geometric artboard polar coordinate system?

　　Here's how:

1. Select "Plot"--"grid style"--"Polar Grid" menu command, the pole tag is "O", the unit point is "A". Select the Ray tool, hold down the SHIFT key, and draw a horizontal ray labeled CD. Using the Point tool, draw any point on the Ray E.

　　

2. Select point C and Point E, select Measure--coordinate distance to measure the coordinate distance of point C and point E. , in the same way, the "coordinate distance" of point C and Point D is measured. Select the CE and CD metrics, select data--calculation, and in the New Calculation dialog box, click CD, ÷, CE, click OK, and the calculation results appear.

　　

3. Right-click the calculated value, select "Properties"--"label", Change to "E", select Point D, press shortcut "Ctrl+h", Hide point D.

　　

4. The same method constructs the horizontal Ray FG and the point h on the ray, the same method measures the coordinate distance of the point F and H, changes the measure label to "P", and hides the point G.

　　

5. Select "E" and "P", click "Draw"--"Paint new function", in the New Function dialog box, click the Equations button, select R=f (θ) in the drop-down list, and click enter "E", "*", "P", "÷", "(", "1", "-", "E", "*", " Cos, θ, click the OK button, display the function image in the action area, and drag the equation to the appropriate position. Drag the point E or point H to change the curve image.

　　

The above content to introduce the use of geometric board polar coordinate construction function image method, the process is not complex, but some fragmented, we need to be careful operation

More Geometry artboards Tutorial: http://www.jihehuaban.com.cn/template.html

How to construct a function image with geometric artboard polar coordinates