Given a triangle with b=5, c-2. and A=12°, what is the length of a? round to nearest tenth.?
回答 (1)
2013-12-12 12:40 pm
✔ 最佳答案
a^2 = b^2 + c^2 - 2bc cos Aa^2 = 25 + 4 - 20 cos 12 = 9.437
a = 3.072 or 3.1 << answer
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https://hk.answers.yahoo.com/question/index?qid=20131212042931AADvTW2