- #1

member 731016

- Homework Statement
- Please see below and https://openstax.org/books/university-physics-volume-1/pages/16-2-mathematics-of-waves for more details.

- Relevant Equations
- Please see below

Where did they get the equation in circled in red from? It does not seem that it can be derived from the graph below.

Many thanks

Many thanks

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