a) If t = tan(C/2) , express sinC and cosC in terms of t.
b) Using the results of (a) , deduce that
(sinC + cosC +1) / (sinC + cosC -1) = {tan[(90+C)/2]} / [tan(C/2)]
Trigonometry - compound angles
2008-03-01 9:55 pm
回答 (1)
2008-03-01 10:55 pm
✔ 最佳答案
Please refer to the following solution:圖片參考：http://hk.geocities.com/stevieg_1023/TRE1.gif
圖片參考：http://hk.geocities.com/stevieg_1023/TRE2.gif
收錄日期: 2021-04-14 19:49:25
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