This Patterns in the 30-60-90 Table assessment also includes:
Sine and cosine ratios have more in common than just their names—they are complementary to each other. Using a 30-60-90 triangle, pupils create a table of the sine and cosine of the acute angles. The learners describe the relationships between pairs of trigonometric ratios of complementary angles and develop a reason for the occurrence.
- Provide other sets of complementary angles for class members to see if the pattern still holds
- Individuals should know the definition of the sine and cosine ratios
- Class members should not use a calculator to better see the relationship
- Contains work examples to illustrate misconceptions
- Provides instructional suggestions