tan(A-B) derivation in terms of tan(A) and tan(B) [video] Oct 1, 2017 21:26:32 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Tiago on Oct 1, 2017 21:26:32 GMT Find out how to derive tan(A-B) from scratch. Just watch the video below. Feel free to post questions, comments and feedback. All the best!