I will soon start studying electrodynamics from Griffith's Electrodynamics. I tried to learn the math required from the first chapter but found that I couldn't understand it very well. So are there some good textbooks for learning multivariable calculus?
I am looking for a multivariable calculus book that is really physics oriented.  Anyone know of any?  EDIT: My wife is looking to brush up on multivariable at the same time she needs to brush up on the related physics.
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