Trigonometry Home › Forums › Trigonometry This forum has 1 topic, 1 reply, and was last updated 9 months, 3 weeks ago by admin. Viewing topic 1 (of 1 total) Topic Voices Posts Last Post If $$tanA = \frac{sinB}{1-cosB}$$ find tan2A Started by: admin 1 2 9 months, 3 weeks ago admin Viewing topic 1 (of 1 total) You must be logged in to create new topics. Log In Username: Password: Keep me signed in Log In