Use the sum and difference formulas to find the exact value of cos(255 degrees)
Which of these is the correct answer?
A. (-√2 + √6)/4
B. (√2 - √6)/4
C. (√2 + √6)/4
D. (-√2 - √6)/4
[show your steps in completing this problem]
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Sum and difference formulas are used to find the exact value of cos(255 degrees). The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.