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Use an Identity to Write the Expression as a Single 2cos⁡275∘−12 \cos ^ { 2 } 75 ^ { \circ } - 1

Question 292

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- 2cos⁡275∘−12 \cos ^ { 2 } 75 ^ { \circ } - 1


A) −12- \frac { 1 } { 2 }

B) 12\frac { 1 } { 2 }

C) 32\frac { \sqrt { 3 } } { 2 }

D) −32- \frac { \sqrt { 3 } } { 2 }

Correct Answer:

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