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Find the Exact Value Using a Double-Angle Identity

Question 82

Multiple Choice

Find the exact value using a double-angle identity.
-cos(450°)


A) -1
B) Find the exact value using a double-angle identity. -cos(450°) A) -1 B) C) 0 D)
C) 0
D) Find the exact value using a double-angle identity. -cos(450°) A) -1 B) C) 0 D)

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