Maths problem, thanks?
回答 (1)
2019-08-18 5:53 pm
✔ 最佳答案
SolCosθ=x>0
Tanθ=√(1－x^2)/x>0
(C)
收錄日期: 2021-04-24 07:41:20
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https://hk.answers.yahoo.com/question/index?qid=20190818070642AAB6OQp