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Lesson Planet
This Trigonometric Functions of Negative Angles interactive also includes:
- Coterminal and Negative Angles
- Student Reference
- Join to access all included materials
When is the trigonometric value of a negative angle the same as the positive angle? Pupils compare the values of trigonometric functions for different angles and their negatives. The interactive resource provides a visual display to make the comparisons easier.
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CCSS:
Designed
Concepts
Additional Tags
Instructional Ideas
- Lead a discussion on the effect on the other four trigonometric functions with negative angles
- Have the class determine whether the negative sign can be pulled out of the angle measurement for all trigonometric functions
Classroom Considerations
- Must sign up for a free account to use the materials
- The video begins at 4:25 with the discussion of negative angles
Pros
- Allows individuals to view the correct answer if they select the wrong one
- Uses colors instead of using the position of the sides
Cons
- None