Solve the following simultaneous equations for x and y:
5 cos x - 4 cos y = 2 and
3 cos ( x + y) - 5 cos y = 3.
Trig. Equation
2009-06-14 6:12 pm
回答 (1)
2009-06-15 3:13 am
✔ 最佳答案
As follows:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/10-7.gif
圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/11-8.gif
2009-06-14 19:14:03 補充：
那道三次方程實在太複雜了,我也是用電腦去計的...
2009-06-14 19:26:42 補充：
For the updated pics for 2nd part , please visit :
http://i707.photobucket.com/albums/ww74/stevieg90/11-8.gif
參考: 菩提大師
收錄日期: 2021-04-22 00:45:24
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https://hk.answers.yahoo.com/question/index?qid=20090614000051KK00453