MQ60 --- Trigonometry

👨🏻‍🏫 學術台數學

用戶27207

2012-12-18 4:26 am

MQ60 --- TrigonometryDifficulty: 60% Solve Σ(k = 1 to n)sin(kx) = Σ(k = 1 to n)cos(kx).

回答 (2)

用戶25975

2012-12-18 5:37 am

✔ 最佳答案

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圖片參考：http://i1191.photobucket.com/albums/z467/robert1973/Dec12/Crazytrigo4_zpsd63c4e6e.jpg

2012-12-18 16:03:55 補充：
Approach using non complex no.:
http://s1191.beta.photobucket.com/user/robert1973/media/Dec12/Crazytrigo5_zps61249e36.jpg.html
http://s1191.beta.photobucket.com/user/robert1973/media/Dec12/Crazytrigo6_zpsfced5111.jpg.html

2012-12-18 16:04:03 補充：
http://s1191.beta.photobucket.com/user/robert1973/media/Dec12/Crazytrigo7_zpsfa718936.jpg.html
http://s1191.beta.photobucket.com/user/robert1973/media/Dec12/Crazytrigo8_zps340c674f.jpg.html

參考: 原創答案

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用戶9112

2012-12-18 6:07 am

Please double check the work and reasoning

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