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Math 250: Differential Equations
Instructor: Joe Erickson (erickson@bucks.edu)
Textbook: A First Course in Differential Equations, 10th Ed., by Dennis Zill
Term: Spring 2016

Announcements

January 21 - Office hours are now in the syllabus (link below).

December 8 - The book assumes some familiarity with the hyperbolic functions. You need to know the definitions of sinh and cosh. The definitions of the other four hyperbolic functions follow in a manner analogous to the trigonometric functions: tanh=sinh/cosh, sech=1/cosh, and so on. Also know the derivatives of sinh and cosh, which are easy: sinh'(t)=cosh(t), which is like sin'(t)=cos(t), and cosh'(t)=sinh(t), which is almost like cos'(t)=-sin(t). See this page for the full lowdown on hyperbolic functions.

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