Trigonometry for Dummies by Sterling Mary Jane;

Author:Sterling, Mary Jane; [Sterling, Mary Jane]
Language: eng
Format: epub
Publisher: John Wiley & Sons, Incorporated
Published: 2023-02-03T00:00:00+00:00

That’s it. And it even turned out simpler-looking than the sine written with tangents.

Changing sine to secant

The next function to define sine is the secant function. You see more radicals on the horizon, but radicals can be “tamed.”

Start with the sine in terms of the cosine (refer to the first change-up in this section).

Now replace the cosine with 1 over its reciprocal.

The radical has a fraction in it. A better form is to simplify that fraction, so find a common denominator and split the fraction into two radicals — the bottom one of which you can further simplify:

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