Algebra II.2.B.16 - Proving Trigonometric Identities – Exit Ticket

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Prove the following identity:

From EngageNY.org of the New York State Education Department. Grade Algebra II Mathematics Module 2, Topic B, Lesson 16. Internet. Available from https://www.engageny.org/resource/algebra-ii-modul...; accessed 21/Apr/2016.