Find the exact value of the expression. sin cos 18 + cos 36 18 sin 36 Write the expression using the sum or difference formula for sine or cosine. Select the correct choice below and fill in the answer E (Simplify your answer. Type an exact answer, using x as needed. Use integers or fractions for any numbers in the expression.) 7x 7x O A. sin cos 18 36 + cos 18 sin cos cos 36 18 36 B. sin + cos sin cos = sin 36 = sin 36 18 36 18 18 7x + cos 36 O C. sin cos sin = sin 36 =sin 36 18 18 18 7x O D. sin cos 18 36 + Cos sin 18 36 cos 18 36 = COS 7n The exact value of sin cos 18 36 + Cos sin 36 18 (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) +

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