【摘要】 本文在三角形内角加权余弦和不等式的基础上,首次给出四边形内角加权余弦和不等式与一般凸n边形内角加权余弦和不等式.更多还原

【Abstract】 Based on the Inequlity for the weighted sum of cosine of interior angles in a triangle , the inequlity for the weighted sum of cosine of interior angles in a quadrilateral and the in-equlity for the weighted sum of cosine of interior angles in any convex n polygon are raised for the first time.更多还原