Date: Sat, 25 Jan 1997 22:35:44 +0800

From: Calvin Lui

Dear Alexander:

I am so sorry that I forgot to tell you what I find difficult about the question.

In this question,I don't not I should use cosine rule or sine rule. I have try to use cosine rule and also sine rule but I still could not solve the question.

The question is so difficult that I can't solve .could you please help me to solve it

From,Ronald