1. Show that cosec X + cot X = cot X/2
2. Deduce the exact value of tan 15⁰ and tan 67.5⁰ in rational surd form.
Note:
1. Answer for number 2 is 2 - √3 , √2 + 1
F6 Trigonometry Maths
2009-09-24 5:38 am
回答 (1)
2009-09-24 5:48 am
✔ 最佳答案
As follows:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/01-60.gif
圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/02-55.gif
收錄日期: 2021-04-22 00:46:49
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