11 Use the unit circle to find the value of cos and even Select the correct choice below and fill in any answer boxes within your choice. 6 or odd trigonometric functions to find the value of 11 cos 6 A. 11x cos 6 () () (-1,0) () (0.1) (0,-1) 6 (1.0) (Type an exact answer, using radicals as needed. Simplify your answer. Rationalize the denominator.) B. The expression is undefined.