有冇咩方式可以搵到sin x=幾多?
唔用計數機又唔知條邊幾長..
要知sin x=?
cos x=?
tan x=?
x可以係任可數
有冇方式計架?
定係冇可能計到?
幫幫我唔該!!
有10分架
sin ge方式
2008-04-24 4:24 am
回答 (4)
2008-05-04 12:02 am
✔ 最佳答案
如果x是in degree的話，請睇：http://hk.knowledge.yahoo.com/question/question?qid=7007121203294
http://hk.knowledge.yahoo.com/question/?qid=7007081003096
http://en.wikipedia.org/wiki/Exact_trigonometric_constants
如果x是in radian的話，
根據http://en.wikipedia.org/wiki/Trigonometric_function#Series_definitions：
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction.jpg
Un is the nth up/down number and please see http://en.wikipedia.org/wiki/Boustrophedon_transform for more information.
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction1.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction2.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction3.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction4.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction5.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction6.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction7.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction8.jpg
圖片參考：http://i212.photobucket.com/albums/cc82/doraemonpaul/yahoo_knowledge/trigonometricfunction/trigonometricfunction9.jpg
2008-04-26 6:45 am
方式就唔知... 但係我可以話你知... sin x 同 cos x 都係介乎 -1 至1
而tan x就 係由 負無限 到 正無限
通常考試係唔會唔比一d hints你去計個 sin, cos 或者 tan
即係好似咁.. 唔比咩triangle你 同 其他 trigonometric ratio你~ 正接咁搵 sin x , cos x 同 tan x 係冇乜可能= ="
而tan x就 係由 負無限 到 正無限
通常考試係唔會唔比一d hints你去計個 sin, cos 或者 tan
即係好似咁.. 唔比咩triangle你 同 其他 trigonometric ratio你~ 正接咁搵 sin x , cos x 同 tan x 係冇乜可能= ="
2008-04-24 4:31 am
sin30=0.5
cos30=root3 over 2
tan30=1 over root 3
sin45=1 over root 2
cos45=1 over root 2
tan45=1
sin60=root 3 over 2
cos60=0.5
tan60=root 3
cos30=root3 over 2
tan30=1 over root 3
sin45=1 over root 2
cos45=1 over root 2
tan45=1
sin60=root 3 over 2
cos60=0.5
tan60=root 3
2008-04-24 4:30 am
sine, cosine, tan都係一D函數...
如你唔想用calculator....
可用sine curve, cosine curve, and tan curve.....
但係用calculator會快and easy好多....
我only can help u that much~~~
Hope u can find your way to calculate those maths!!
如你唔想用calculator....
可用sine curve, cosine curve, and tan curve.....
但係用calculator會快and easy好多....
我only can help u that much~~~
Hope u can find your way to calculate those maths!!
收錄日期: 2021-04-19 00:55:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080423000051KK02346