Given that sin 30 = 1/2 and cos 30 = (sqrt3)/2, express sin 15 and cos 15 in surd form.
sin 15 and cos 15
2009-05-16 5:33 pm
回答 (1)
2009-05-16 6:04 pm
✔ 最佳答案
express sin 15o and cos 15o in surd form.圖片參考：http://f.imagehost.org/0191/ScreenHunter_04_May_14_22_18.gif
2009-05-16 10:05:25 補充：
sin 15:
http://f.imagehost.org/0658/ScreenHunter_03_May_14_22_17.gif
收錄日期: 2021-04-23 20:37:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090516000051KK00344