= Quiz: 5.1 Quiz 2... Question 5 h Next Que 1 - cos 0 sin 0 Establish the identity + =2 csc 0. sin 0 1 - cos 0 Which of the following shows the key steps in establishing the identity? 1 - cos 0 sin 0 (1 + cos 0)~ + sin 2 e O A. 2 + sin 0 1 - cos 0 sin 0(1 + cos 0) = 2 csc 0 cos 0 1 - cos 0 sin 0 O B. (1 + cos 0) + sin2 0 2(1 + sin 0) sin 0 + 1 - cos 0 sin 0(1 + cos 0) cos 0(1 + sin 0) = 2 csc 0 1 - cos 0 sin 0 O C. (1 - cos 0) + sin 2 0 2(1 - cos 0) sin 0 + 1 - cos 0 sin 0(1 - cos 0) sin 0(1 - cos 0) = 2 csc 0 1 - cos 0 sin 0 O D. (1 - cos 0)- + sin 2 0 2 sin 0 1 - cos 0 sin 0(1 - cos () =2 csc 0 COS O