Prove the given identity. 1 sec 0 = tan sin e sec 0 Choose the correct proof below. 1 1 cos e O A. sec 0 sin 20 cos = sec 0 = tan sin e cos e 1 - cos 2 cos 1 1 1 - cos B. sec 0- cos 20 cos O = cos 0= sec 0 tan (sin 0 cos e cos e 2 sin 1 1 OC. sec 0- 1 - cos sin 0 2 = cos = sec 0 cos e = tan sin e cos e cos e 2 OD. sec 0 1 sec 0 1 cos e 1 - cos cos e = tan sin e cos 0 sec 0 cos e sin 2