题目内容

(08年五市联考理) (12分)在中,角BC所对的边分别是.

(Ⅰ)求角C

(Ⅱ)若的最短边长是,求最长边的长.

解析:(I)为锐角,则.                           (2分)

                            又为锐角,则.                                          (3分)

         .(5分)

         又.                                                                                                        (6分)

(Ⅱ).                                                 (8分)

  最小,c最大.                                                                                                         (10分)

由正弦定理得:                   (12分)

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