just need an explaintion i can go off of

Question

Express in terms of tangents of and . You do NOT need to type in the degree symbol. Be sure to PREVIEW your answer before submitting!

Answer 1

Chlo, I googled “tangent difference of angles” and got a hit on Clark University, called Summary of trigonometric identities, showing a formula that does exactly that: gives a formula for tan ( a - b ) in terms of tan(a) and tan(b). Check it out!

Answer 2

tan (23° - 21°) = (tan 23° - tan 21°) / (1 + tan 23° tan 21°)