一个直角三角形的三内角的正弦成等比数列,其最小角的正弦值为( )A.二分之(根号五减一)括号的意思即为分母是根号五减一,下面选项同样B二分之一C四分之(根号五减一)D四分之(根
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![一个直角三角形的三内角的正弦成等比数列,其最小角的正弦值为( )A.二分之(根号五减一)括号的意思即为分母是根号五减一,下面选项同样B二分之一C四分之(根号五减一)D四分之(根](/uploads/image/z/8740173-21-3.jpg?t=%E4%B8%80%E4%B8%AA%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%89%E5%86%85%E8%A7%92%E7%9A%84%E6%AD%A3%E5%BC%A6%E6%88%90%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E5%85%B6%E6%9C%80%E5%B0%8F%E8%A7%92%E7%9A%84%E6%AD%A3%E5%BC%A6%E5%80%BC%E4%B8%BA%EF%BC%88+%EF%BC%89A.%E4%BA%8C%E5%88%86%E4%B9%8B%EF%BC%88%E6%A0%B9%E5%8F%B7%E4%BA%94%E5%87%8F%E4%B8%80%EF%BC%89%E6%8B%AC%E5%8F%B7%E7%9A%84%E6%84%8F%E6%80%9D%E5%8D%B3%E4%B8%BA%E5%88%86%E6%AF%8D%E6%98%AF%E6%A0%B9%E5%8F%B7%E4%BA%94%E5%87%8F%E4%B8%80%2C%E4%B8%8B%E9%9D%A2%E9%80%89%E9%A1%B9%E5%90%8C%E6%A0%B7B%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80C%E5%9B%9B%E5%88%86%E4%B9%8B%EF%BC%88%E6%A0%B9%E5%8F%B7%E4%BA%94%E5%87%8F%E4%B8%80%EF%BC%89D%E5%9B%9B%E5%88%86%E4%B9%8B%EF%BC%88%E6%A0%B9)
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