a、b、c、是三角形ABC三边,a、b、c、满足等式:b的平方=(c+a)(c-a),且5b-4c=0.求sinA+sinB的值
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![a、b、c、是三角形ABC三边,a、b、c、满足等式:b的平方=(c+a)(c-a),且5b-4c=0.求sinA+sinB的值](/uploads/image/z/573393-57-3.jpg?t=a%E3%80%81b%E3%80%81c%E3%80%81%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%89%E8%BE%B9%2Ca%E3%80%81b%E3%80%81c%E3%80%81%E6%BB%A1%E8%B6%B3%E7%AD%89%E5%BC%8F%3Ab%E7%9A%84%E5%B9%B3%E6%96%B9%3D%EF%BC%88c%2Ba%29%28c-a%29%2C%E4%B8%945b-4c%3D0.%E6%B1%82sinA%2BsinB%E7%9A%84%E5%80%BC)
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