已知α、β都是锐角,sinα=1/5,cos(α+β)=5/13,则sinα的值为(刚才出错啦,sorry!)已知α、β都是锐角,sinα=1/5,cos(α+β)=5/13,则sinβ的值为

问题描述:

已知α、β都是锐角,sinα=1/5,cos(α+β)=5/13,则sinα的值为
(刚才出错啦,sorry!)
已知α、β都是锐角,sinα=1/5,cos(α+β)=5/13,则sinβ的值为