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EK

Jan 6, 2021

The course is challenging. I learned a lot about trigonometric functions and their behavior. I can now understand periodic ODEs better now...

MC

Apr 3, 2022

Would have liked more background into range, domain, etc since it was on test questions....

From the lesson

Module 3: Sine and Cosine as Periodic Functions

Sine and cosine are now introduced using the unit circle, which is the circle centered at the origin with radius one. This definition of our key periodic functions extends the definition originally introduced with right triangles.

Taught By

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    Joseph W. Cutrone, PhD

    Senior Lecturer and Director of Online Programs

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