Establish the identity. 1 - sin 0 1 + sin (tan 0- sec o) Starting with the right side, which shows the key steps in establishing the identity? O A. ( sin 0 - 1)2 1 - sin 0 ( tan 0 - sec 0) = tan = 0 - sec 2 0= 1 - sino 1 + sin 0 O B. sino 2 sin 0 (tan 0 - sec 0) ( sin 0-1)- 1 - sin 0 + cos = 0 cos cos