Rewrite the expression as the sine cosine, or tangent of a double-angle. Then find the exact value of the trigon 31 2 sin COS 8 8 Use the appropriate double-angle formula to rewrite the given expression as the sine, cosine, or tangent of the co 2 sin COS 8 8 (Do not evaluate. Use integers or fractions for any numbers in the expression. Type your answer in radians.) Find the exact value of the trigonometric expression without the use of a calculator. 2 sin 8 COS (Use integers or fractions for any numbers in the expression. Type an exact answer, using radicals as needed.)