I have a problem that says that:
$2 \tan(\beta/2) = \tan(\beta − \alpha)$
Where the value of the $\alpha$ angle is known. What I need to get is the value of $\beta$. How can I obtain it from that?
For context, the figure i'm looking at is this:
The $\beta − \alpha$ angle is the $A$ angle from the $ACE$ triangle, and the $\beta/2$ angle is the $A$ angle from the $ADE$ triangle.