tan 15°

Question

tan (45°-30°)
(tan 45° - tan 30°)/1+ tan 45°tan30°
(1-√3/3)/(1+1√3/3)

then i donnt what to do/ chancel out. Can someone finish it if i didn't get it wrong.

thanks in advance

Answer 1

I would rationalize the denominator

(1-1/3 sqrt3)^2/(1-1/3)=3(1-1/3 sqrt3)^2/2