Write the following expression as the sine, cosine, or tangent of a double angle. Then nd the exact 1u'alue ot the expression. 25in 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 ll in the answer box to com [Simplify your answer. Type your answer in degrees. Use integers or decimals for any numbers in the expression.) '3' A- 25in 22.5\" c0522.5=cos|:| Cl 3- 25in22.5\"c0522.5=5inD D C- 25in 22.5\" c0522.5 =tan D\" The exact value of The given expression is El. {Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize the denominator.)