日期: Tue, 4 Jan 2011 15:54:35 +0800
寄件人: Wei-Yin Lin <linweiyin@gmail.com>
主旨: The cosine formula
收件人:  ACB

Dear all,

There is a simple concept for today's discussion about the cosine formula over R^2 on my note. FYI.

Cheers,

Wei-Yin

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日期: Tue, 04 Jan 2011 21:47:41 +0800
寄件人: Kun-Mao Chao
主旨: The cosine formula

Dear Wei-Yin,

This explanation is exactly what I needed. Thanks. 得證。

Kun-Mao

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日期: Tue, 4 Jan 2011 21:19:35 +0800
寄件人: 朱安強
主旨: The cosine formula

Dear all,

There is a complex concept for today's discussion about the cosine formula. FYI

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日期: Tue, 04 Jan 2011 22:01:39 +0800
寄件人: Kun-Mao Chao
主旨: The cosine formula

Dear Master An-Chiang,

That's a very decent explanation. Thanks. Let me quote a message sent from our ACB alumna a few days ago.

......常常懷念起大家，一起上課、一起瞇挺煮湯圓或是聽安強唬人XD......

Keep shining, An-Chiang.

Kun-Mao