for what x does 2x = cos 2x ?
回答 (3)
2015-09-09 5:31 pm
x = 0.37 radians (0.236π)
2015-09-09 4:55 pm
x ≈ 21.173229417°
2015-09-09 4:38 pm
sd
收錄日期: 2021-05-01 15:22:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150909083832AAGjn07