Question: Use a sum or difference formula to find the exact value of the trigonometric function. cosine 105 degrees Question content area bottom Part 1 cosine

Use a sum or difference formula to find the exact value of the trigonometric function. cosine 105 degrees Question content area bottom Part 1 cosine 105 degreesequals enter your response here (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)

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