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Course: Precalculus > Unit 2

Lesson 9: Angle addition identities
Math
Precalculus
Trigonometry
Angle addition identities
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Trig angle addition identities

Google Classroom
Sal reviews 6 related trigonometric angle addition identities: sin(a+b), sin(a-c), cos(a+b), cos(a-b), cos(2a), and sin(2a). Created by Sal Khan.

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Video transcript