I am trying to find the exact value for tan(15). I figure my equation as 40 - 30 to give the 15.(adsbygoogle = window.adsbygoogle || []).push({});

when deriving my equation is where I have the problem. can anyone help please.

(1-√(3)/3)/(1 + 1 * √(3)/3)

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Tangent sum or difference

**Physics Forums | Science Articles, Homework Help, Discussion**