1.在三角形ABC中,若a/cos(A/2)=b/cos(B/2)=c/cos(C/2),则三角形ABC的形状?2.在三角形ABC中,A=60度,BC=3,则三角形ABC周长为?3.在锐角三角形ABC中,BC=1,B=2A,则AC的取值范围为?4.某港口O要将一件重要物品用小艇送
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![1.在三角形ABC中,若a/cos(A/2)=b/cos(B/2)=c/cos(C/2),则三角形ABC的形状?2.在三角形ABC中,A=60度,BC=3,则三角形ABC周长为?3.在锐角三角形ABC中,BC=1,B=2A,则AC的取值范围为?4.某港口O要将一件重要物品用小艇送](/uploads/image/z/5397115-67-5.jpg?t=1.%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E8%8B%A5a%2Fcos%28A%2F2%29%3Db%2Fcos%28B%2F2%29%3Dc%2Fcos%28C%2F2%29%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%BD%A2%E7%8A%B6%3F2.%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CA%3D60%E5%BA%A6%2CBC%3D3%2C%E5%88%99%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%91%A8%E9%95%BF%E4%B8%BA%3F3.%E5%9C%A8%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2CBC%3D1%2CB%3D2A%2C%E5%88%99AC%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E4%B8%BA%3F4.%E6%9F%90%E6%B8%AF%E5%8F%A3O%E8%A6%81%E5%B0%86%E4%B8%80%E4%BB%B6%E9%87%8D%E8%A6%81%E7%89%A9%E5%93%81%E7%94%A8%E5%B0%8F%E8%89%87%E9%80%81)
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