rTRIGONOMETRIC IDENTITIES - Wright State University
1. Introduction An identity is an equality relationship between two mathematical expressions. For example, in basic algebra students are expected to master various algbriac factoring identities such as a 2−b =(a−b)(a+b)or a 3+b =(a+b)(a2 −ab+b2): Identities such as these are used to simplifly algebriac expressions and to solve alge-briac ...
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