Establish the identity. 1 - sin 0 1 + sin =(sec 0- tan 0) Starting with the right side, which shows the key steps in establishing the identity? O A. ( sec 0- tan 0) = sec2 0- tan 20= (1- sin 0) 1 - sin 0 1 - cos -0 1+ sin 0 OB. ( sec 0- tan 0) = 1 2sin 0 sin 0 (1- sin 0) 1 - sin 0 cos - 0 cos -0 cos 20 1- sin 0 1 + sin 0 OC. (sec 0- tan 0) = 1 2 sin 0 sin 0 (1- sin 0) 1 - sin 0 cos *0 cos -0 cos -0 1- cos 0 1+ sin 0 OD. ( sec 0- tan 0) = sec 20 - tan 2 0= (1 - sin 0) 1 - sin 0 1 - sin -0 1 + sin 0