Exponentials Made Easy or the Story of Epsilon (Classic Reprint)

Excerpt from Exponentials Made Easy or the Story of Epsilon

Some time ago the author came across a certain little book, and although he was supposed to know all about the things explained in it, he found a great delight in reading it. In so doing he re-learned several things he had forgotten and learned a few others he had not chanced to meet before. But the most useful knowledge he derived from reading this truly delightful little book Calculus Made Easy was that, indeed, it is possible to make the study of such mathematical processes as those of the Calculus so easy that one may learn them by oneself without the help of a teacher, provided one has in one's hand the necessary guide and faithfully follows it from beginning to end.

There are few branches of mathematics which seem more puzzling to beginners than the study of imaginaries and hyperbolics; indeed, many students who are no longer looking askance at or at the sign I confess that the appearance of i in a mathematical expression gives them a nerve-shattering shock, while the sight of sinh or cosh is the signal for undignified retreat.

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