[請問] sin(3X+2Y)對X偏微的算法:Realtime－new htc one開箱,htc手機評價,htc手機比較,htc手機遊戲,htc手機維修,htc手機價位,htc手機推薦,htc手機鈴聲,中華電信htc手機,htc手機截圖,亞太htc手機,

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批踢踢實業坊 ask 板

Sep 3rd 2014, 00:55, by noovertime

作者noovertime (敻)

站內ask

標題[請問] sin(3X+2Y)對X偏微的算法

時間Wed Sep 3 00:55:00 2014

要對 sin (2X+3Y) 的 X 做偏微的算法是要利用和角公式拆成 sin2X cos3Y + sin3Y cos2X 來對 X 做偏微變成 cos2X * 2 * cos3Y + sin3Y * -sin2X * 2 還是可以直接微，變成 cos (2X+3Y) * 2 呢？ -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 121.254.89.38 ※ 文章網址: http://www.ptt.cc/bbs/ask/M.1409676902.A.ED1.html

推 mepass: 你不是驗算OK了嗎用和角公式 09/03 00:59

→ noovertime: 原來上下是一樣的～～算昏頭了orz 09/03 01:05

噓 Avicii: sin30=1/2 END 09/03 01:10

推 chienweichih: 樓上再講啥ㄏㄏ 09/03 01:24

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