Tangent Half Angle Formula Formula

Equation for calculate tangent half angle formula is,

$\tan \frac{A}{2}=\frac{1-\tan \left(\frac{B}{2}\right)·\tan \left(\frac{C}{2}\right)}{\tan \left(\frac{B}{2}\right)+\tan \left(\frac{C}{2}\right)}$

The tangent of a half angle is given by:

tan(​2​​/α​​) = (1−cosα) / sinα

where,
A = Angle of the triangle (less than 180°) (degree),
B = Angle of the triangle (less than 180°) (degree),
C = Angle of the triangle (less than 180°) (degree)