If tanθ =1/a(a>0), then cosθ = ??
show steps . thx
Maths Sin... question
2007-07-28 6:58 pm
回答 (3)
2007-07-28 7:39 pm
✔ 最佳答案
As follows:圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/mathsfunction.jpg?t=1185593963
參考: Myself~~~
2007-07-28 7:15 pm
cosθ＝ａ／（ａ＾２＋１）＾０．５
2007-07-28 7:05 pm
tanθ =1/a
sinθ/cosθ =1/a
a.sinθ =cosθ
sinθ/cosθ =1/a
a.sinθ =cosθ
收錄日期: 2021-05-03 13:08:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070728000051KK01151