the men of the tribe dressed and masked to represent the Kachinas in a traditional ceremony.Even though there are male and female Kachinas, only men can represent them.
a masked doll which represents a kachina spirit. They are presented to the women and children of the tribe.
... usual form of the quadratic formula is not ideal. See Loss of significance for details.
Derivation
The quadratic formula is derived by the method of completing the ...