Click here to watch the video Establish the identity 1 sin 0 1 sin 0 OB O C tan 0 sec 0 Starting with the right side which shows the key steps in establishing the identity O A O D tan 0 sec 0 tan 0 sec 0 H 2 sin 0 2 cos 0 sin 0 2 cos 0 2 2 sin 0 cos 0 2 sin 0 2 cos 0 tan 0 sec 0 tan 0 sec 0 tan 8 sec 0 tan 0 sec 0 2 by workin DOC 1 Cos 0 1 cos 0 sin 0 1 2 1 sin 0 sin 8 1 20 1 cos sin 0 1 1 sin 0 2 sin 0 1 2 1 cos 0 1 sin 0 1 sin 0 1 sin 0 1 sin 0 Sant 1 sin 0 1 sin 0 1 sin 0 1 sin 0