This book seems to be about calculation in the real world. It is clearly aimed at electrical engineers and has some very useful tricks and tips for survival. Some mathematics department survive by supporting engineering, chemistry and physics ( the hard subjects of the modern university?). In turn we have many mathematics professors hating calculus and any practical calculations. Texts like this are made to take up the abuse the math department hands out and heal the engineering student. Both physics and chemistry need a similar sort of practical math text!
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