Tuesday

September 23, 2014

September 23, 2014

Posted by **Anonymous** on Wednesday, November 12, 2008 at 7:58pm.

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 didnt get it wrong.

thanks in advance

- Trig - tan 15° using composite argument? -
**bobpursley**, Wednesday, November 12, 2008 at 8:03pmI would rationalize the denominator

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

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