已知△ABC,∠B=60°,且sinA-sinC https://bgk-photo.cdn.bcebos.com/baidu/pic/item/91ef76c6a7efce1b5a484358a751f3deb58f65c5.jpgcos(A-C)=https://bgk-photo.cdn.bcebos.com/baidu/pic/item/cf1b9d16fdfaaf5139800a2d845494eef11f7ac5.jpg.求sinC的值.
发布时间:2024-06-10 10:52:58