This site contains a tool for exploring the angles and coordinates of the unit circle and the patterns among both.
Type of Material:
Simulation.
Recommended Uses:
The material would be well suited to use for in-class demonstrations or individual exploration.
Technical Requirements:
Any Browser.
Identify Major Learning Goals:
The main goal of this site is to aid users in visualizing and positioning points on the unit circle.
Target Student Population:
High School, College Lower Division
Prerequisite Knowledge or Skills:
College Algebra Trigonometry.
Content Quality
Rating:
Strengths:
The applet is interactive and user friendly. Users can display points on the unit circle for common angles. Users can also manipulate a given point on the unit circle and can display right triangle as well as the lengths of each side of this triangle.
Concerns:
The angle created by manipulating the point is displayed in degree mode only and this is a disadvantage of this tool.
Potential Effectiveness as a Teaching Tool
Rating:
Strengths:
This applet is a great tool for helping students to visualize points on the unit circle and to help identify patterns. It could be used during a lecture or it could be incorporated into a group/individual activity.
Concerns:
The site could be improved by including a brief overview of the unit circle and how it is related to material in trigonometry or at least give a link to the appropriate material.
Ease of Use for Both Students and Faculty
Rating:
Strengths:
This applet is interactive and intuitive. The contrast use of color is quite nice.
Concerns:
The displayed points can be difficult to read if the graph is zoomed in too much. If the graph is positioned so that any portion overlaps the checked boxes, the graph will need to be repositioned in order to check/uncheck.
Creative Commons:
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