Appendix – Basic Functions and Identities

Graphs of the Parent Functions

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Figure A1
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Figure A2
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Figure A3

 

Graphs of the Trigonometric Functions

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Figure A4
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Figure A5
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Figure A6
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Figure A7

 

Trigonometric Identities

Table A1

Pythagorean Identities

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Even-Odd Identities

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Cofunction Identities

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Fundamental Identities

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Sum and Difference Identities

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Double-Angle Formulas

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Half-Angle Formulas

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Reduction Formulas

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Product-to-Sum Formulas

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Sum-to-Product Formulas

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Law of Sines

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Law of Cosines

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Topics in Precalculus Copyright © by Sage Bentley; An Do; Carolyn Luna; Stephen Pena; and Phillip Saldivar is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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