- #1
Davio
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Homework Statement
y = A cos (kx-wt)
differentiate twice is -A^2k^2 cos (kx-wt)
Why?
Homework Equations
n/a
The Attempt at a Solution
-w^2 A cos (kx-wt)
Good catch arunbg, didn't notice that myselfarunbg said:Yes, you should use chain rule, but more importantly,what are you differentiating the function with respect to ? The answer the text gave has a quantity A^2, which I believe can't be obtained by differentiating the eqn, wrt any given variable in the function. Please check if you made an errors in copying the answer.
Thanks arunbg , much appreciated. I've not 'seen' you much on the forums lately, hope everything is good at your end.arunbg said:Oh, and hoot congrats for goin gold, and keep up the good work.
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