Section 7.5. Hyperbolic trig functions.
We talked a bit about why the word "hyperbolic" is there. Both circles and hyperbolae are conic sections.
Section 7.6. Partial fractions.
So far we did a couple of examples. The basic trick, to figure out the coefficient on some term, is to multiply through by that denominator THEN set the once-denominator equal to 0. All other terms die, exposing the one you're trying to compute.
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