来自陈绍凤的问题
证明题:已知△ABC的各条边为a,b,c,外接圆半径为R求证:(a²+b²+c²)(1/(sinA)²+1/(sinB)²+1/(sinC)²)>=36R²
证明题:已知△ABC的各条边为a,b,c,外接圆半径为R
求证:(a²+b²+c²)(1/(sinA)²+1/(sinB)²+1/(sinC)²)>=36R²
1回答
2020-05-16 13:22