In triangle ABC, AC=20, BC=30. Express AB by angle A.
[By sine formula or cosine formula]
1 trigonometry Q.
2011-09-11 5:22 am
回答 (1)
2011-09-11 5:31 pm
收錄日期: 2021-04-13 18:13:44
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https://hk.answers.yahoo.com/question/index?qid=20110910000051KK00882