#### hayling123

##### New member

- Joined
- Jan 14, 2022

- Messages
- 1

I'm working my way through some problems and have become stuck on the following questions-

"Use the double-angle identity for tangent, and the exact value of tan(5π/6), for a different way to find an exact value of tan(5π/12)."

I have already shown the exact value of tan(5π/12) is 2+sqrt3

Any help with how i'd go about it would be great. I know I will need to solve a quadratic equation, but any help to get there would be fantastic

cheers