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Use a Reference Angle to Find the Exact Value of the Expression

Question 138

Multiple Choice

Use a reference angle to find the exact value of the expression.
-sin 780°


A) Use a reference angle to find the exact value of the expression. -sin 780° A) B) C) D)
B) Use a reference angle to find the exact value of the expression. -sin 780° A) B) C) D)
C) Use a reference angle to find the exact value of the expression. -sin 780° A) B) C) D)
D) Use a reference angle to find the exact value of the expression. -sin 780° A) B) C) D)

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