Reflection: Connection to Prior Knowledge Riding a Ferris Wheel - Day 2 of 2 - Section 2: Summarize

 

While we were evaluating sec(5pi/6) I asked a student what the angle measure would be in degrees. I circled pi/6 and asked how many degrees it should be. The student knew right away that it is 30 degrees. Then I asked her how many degrees it would be since we have five 30 degree pieces. Very excitedly she exclaimed, "Ohhhhhhh! That's such an easy way to do it! I wasted so much time last year converting from radians to degrees."

This student probably memorized a formula and always used it to convert from radians to degrees or vice versa. I'm glad that I was able to give students a more efficient method that made sense to them.

  Connection to Prior Knowledge: A-Ha Moment
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Riding a Ferris Wheel - Day 2 of 2

Unit 4: Trigonometric Functions
Lesson 2 of 14

Objective: SWBAT evaluate trigonometric expressions involving degrees and radians.

Big Idea: Make the transition from the Ferris wheel problem to the unit circle.

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