Adjustable unit circle board for evaluating trigonometric functions and their signs
Description
FIG. 1 is a front elevational view of the adjustable unit circle board for evaluating trigonometric functions and their signs showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a right side view thereof
FIG. 4 is a left side view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
Referenced Cited
Patent History
Patent number: D409098
Type: Grant
Filed: Jul 28, 1997
Date of Patent: May 4, 1999
Inventor: Shoshana Michaeli (Fair Lawn, NJ)
Primary Examiner: Antoine Duval Davis
Application Number: 0/74,208
Type: Grant
Filed: Jul 28, 1997
Date of Patent: May 4, 1999
Inventor: Shoshana Michaeli (Fair Lawn, NJ)
Primary Examiner: Antoine Duval Davis
Application Number: 0/74,208
Classifications