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    Trigonometry Study Set 1
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    Exam 5: Trigonometric Identities
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    Decide Whether the Expression Is or Is Not an Identity
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Decide Whether the Expression Is or Is Not an Identity

Question 156

Question 156

Multiple Choice

Decide whether the expression is or is not an identity.
-tan 80°


A) cot 10°
B) tan 10°
C) cot 170°
D) cot 100°

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