tanA=2.4,要sinA and cosA
回答 (3)
2010-08-12 1:41 am
2010-08-11 11:14 pm
2010-08-11 10:05 pm
tanA=2.4
tanA=12/5
____________
12^2+5^2=x^2(Pyth.theorem)
x.............=13
_______________
sinX:12/13
cosX:5/13
2010-08-11 14:06:40 補充：
Draw a picture!
tanA=12/5
____________
12^2+5^2=x^2(Pyth.theorem)
x.............=13
_______________
sinX:12/13
cosX:5/13
2010-08-11 14:06:40 補充：
Draw a picture!
收錄日期: 2021-04-23 22:04:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100811000051KK00795