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10楼#
发布于：2009-07-24 20:32
sina+sinb+sinc大于sin30+sin30+sin30=3/2
这样也可以呀O(∩_∩)O哈哈~ |
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11楼#
发布于：2009-07-25 13:14
回复
是大于，用代入法求解。 |
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12楼#
发布于：2009-07-25 19:55
相等吧
sin60+sin60+sin60=3/2 |
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13楼#
发布于：2009-07-25 19:57
不对，给晕啦，大于
sin60+sin60+sin60大于3/2 |
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14楼#
发布于：2009-07-25 20:29
答案是 ： 大于
过程： |
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15楼#
发布于：2009-08-06 15:48
公布正确答案！
本题正确答案是：
图片：daan.jpg 
如果同学们对本题有疑问，欢迎登录http://www.etlearning.cn/g3/freelesson/?c=111145 ”，选听丁益祥老师主讲的《数学思想在解题中的应用》。 |
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16楼#
发布于：2009-08-16 11:07
时大于没:错
 |
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17楼#
发布于：2009-10-08 11:06
，对喽
 : |
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