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Find the Exact Value Using a Double-Angle Identity

Question 343

Multiple Choice

Find the exact value using a double-angle identity.
-cos Find the exact value using a double-angle identity. -cos A) 1 B) C) 0 D)


A) 1
B) Find the exact value using a double-angle identity. -cos A) 1 B) C) 0 D)
C) 0
D) Find the exact value using a double-angle identity. -cos A) 1 B) C) 0 D)

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