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Use Odd and Even Identities to Simplify the Expression

Question 558

Multiple Choice

Use odd and even identities to simplify the expression.
-cos (-x) cos x - sin (-x) sin x

A) 2
B) Use odd and even identities to simplify the expression. -cos (-x) cos x - sin (-x) sin x A) 2 B) C) 1 D)
C) 1
D)

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