Write the following expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2 sin 22.5° cos 22.5° Write the following expression as the sine, cosine, or tangent of a double angle. Select the correct choice below and fill in the answer box to complete your choice. (Simplify your answer. Type your answer in degrees. Use integers or decimals for any numbers in the expression.) OA. 2 sin 22.5° cos 22.5° sin o OB. 2 sin 22.5° cos 22.5° cos OC. 2 sin 22.5° cos 22.5° = tan The exact value of the given expression is ☐ . (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize the denominator.)

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