Trigonometry - mecmath

TRIGONOMETRYMICHAEL CORRALT rigonometryMichael CorralSchoolcraft CollegeAbout the author:Michael Corral is an Adjunct Faculty member of the Department ofMathematics atSchoolcraft College. He received a in Mathematics from the University of Californiaat Berkeley, and received an in Mathematics and an in Industrial & OperationsEngineering from the University of text was typeset in LATEX with theKOMA-Scriptbundle, using the GNU Emacstext editor on a Fedora Linux system. The graphics were created using TikZ and 2009 Michael is granted to copy, distribute and/or modify this document under the terms of theGNU Free Documentation License, Version or any later version published by the FreeSoftware Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-CoverTexts. A copy of the license is included in the section entitled GNU Free DocumentationLicense.

2 Chapter 1 • Right Triangle Trigonometry §1.1 (a) Two acute angles are complementary if their sum equals 90 .In other words, if 0 ≤ ∠ A,∠B≤90 then ∠A and ∠ Bare complementary if ∠ +∠ =90 . (b) Two angles between 0 and 180 are supplementary if their sum equals 180 .In other words, if 0 ≤∠ A,∠B≤180 then ∠ and ∠B are supplementary if ∠A+∠B=180 .

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