(2011•菏泽)(1)计算: ﹣(4﹣π) 0 ﹣6cos30°+|﹣2|;
1个回答
(1)原式=
=1;
(2)证明:在△ABC与△DCB中
AC平分∠BCD,BD平分∠ABC,
∴△ABC≌△DCB.
∴AB=DC.
略
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