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Activity
University of Arizona

The University of Arizona: Modeling With Sinusoidal Functions [Pdf]

For Students 9th - 10th Standards
This site provides several real-world application problems that can be solved using sinusoidal functions. Students are asked to sketch, model and solve the problems.
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Unit Plan
Khan Academy

Khan Academy: Amplitude of Sinusoidal Functions From Equation

For Students 9th - 10th
Given the formula of a sinusoidal function, determine its amplitude. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unit Plan
Khan Academy

Khan Academy: Algebra Ii: Construct Sinusoidal Functions

For Students 9th - 10th Standards
Given a few features of a sinusoidal function, find its formula. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.