已知△ABC,∠B=60°,且sinA-sinC https://bgk-photo.cdn.bcebos.com/doc/pic/item/0b55b319ebc4b745dac1de3fc7fc1e178a821545.jpgcos(A-C)=https://bgk-photo.cdn.bcebos.com/doc/pic/item/77094b36acaf2eddb09f20c0851001e9390193a8.jpg.求sinC的值.
发布时间:2024-06-10 10:52:58