Read a cosine model
Identify a midline, amplitude and period in a supplied periodic function.
Open lesson 1Interpret and Construct Periodic Models
Read, build, shift, and solve levels of supplied cosine functions over stated intervals.
Before you begin
- Substitute into a function and solve a simple equation.
- Read radians with π and use the cosine values supplied in each activity.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Build a Cosine Rule from Features
Construct a cosine model from extrema, period, and starting phase.
Open lesson 2Track a Shifted Cosine Pattern
Use a horizontal shift to locate peaks and quarter-period values.
Open lesson 3Find Two Times at a Given Level
Solve a cosine-level equation over one stated cycle.
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.