Reflection: Joy What is the connection between trigonometric graphs and polar graphs? (Day 1 of 2) - Section 5: Closure

 

Here is a student example of a polar graph depicting what she called a "spider". The student was very excited to see this graph produced.  After displaying her graph to the class, another student added that he wanted to add a rose on the back of the spider. This student added the equation and together they both adjusted the equation until they agreed on the look of the spider and rose.

Other students really liked adjusting the equation for a rose. One student commented that he had made the sun and then showed others his calculator. The students really liked being able to create very different graphs as they worked.

Creating a design would be a great extension to this unit when time allows.  There are several activities like this on the web: site 1 and site 2.

 

 

 

  Joy: Example of Student graph
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What is the connection between trigonometric graphs and polar graphs? (Day 1 of 2)

Unit 12: Parametric and Polar graphs and equations
Lesson 4 of 7

Objective: SWBAT use a trigonometric graph on the rectangular coordinate plane to graph a polar graph.

Big Idea: If I graph an equation on the rectangular coordinate plane and the polar plane the graphs look completely different why?

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