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2Â¥: Originally posted by feixiaolin at 2013-08-22 16:59:46
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x3+iy3=(x2+iy2)*|BC|*exp(i theta)
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2Â¥: Originally posted by feixiaolin at 2013-08-22 16:59:46
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µ³Ð¡Óã: ½ð±Ò+5, ¡ïÓаïÖú, Orz 2013-08-26 22:02:09
x3+iy3=(x2+iy2)*|BC|*exp(i theta)
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x3+iy3=(x2+iy2)*|BC|*[cos(theta) +  i sin(theta)]
=|BC|* [x2 *cos(theta) -y2* sin(theta)]+ i*|BC|*[y2 *sin(theta) +x2* cos(theta)]
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x3=|BC|* [x2 *cos(theta) -y2* sin(theta)]
y3=|BC|*[y2 *sin(theta) +x2* cos(theta)]
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4Â¥2013-08-24 14:50:39
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