(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

y = A cos (kx-wt)

differentiate twice is -A^2k^2 cos (kx-wt)

Why?

2. Relevant equations

n/a

3. The attempt at a solution

-w^2 A cos (kx-wt)

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# Homework Help: Calculus quick question

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