【摘要】 对于 n维欧氏空间 En中的单纯形 ,建立了与单纯形顶点相邻的诸二面角和诸二棱角相关的三角等式 ,并根据这一等式得到高维余弦公式 .更多还原

【Abstract】 Gave trigonometric equalities of simplices which show a relation between dihedral angles and diedge angles of simplices. By means of the equality,some useful results of n simplices are obtained.更多还原