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Find the Exact Value Using a Double-Angle Identity

Question 227

Multiple Choice

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


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

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