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zhaoyanqiao

Ìú³æ (ÕýʽдÊÖ)

[ÇóÖú] ÎÒÏëÇëÎÊÒ»¸ömatlab±à³ÌµÄÎÊÌ⣬sin£¨v/2£©=3*v/14/pi

ÎÒÏëÇó½â¡°sin£¨v/2£©=3*v/14/pi£»¡±£¬²»ÖªµÀmatlab³ÌÐòÈçºÎ±àд£¬¿ÒÇë¸ßÈ˽â´ð£¬²¢Âé·³¸½ÉϳÌÐò´úÂ룬ллÁË

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

Ïò´ó¼Òѧϰ
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

luomia

ľ³æ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

ÒýÓûØÌû:
7Â¥: Originally posted by zhaoyanqiao at 2012-07-07 09:40:24
v=0:0.1:10;
y1=sin(v/2);
y2=3*v/14/pi;
plot(v,y1)
hold on
plot(v,y2)
grid on

¿ÉÒÔ¿´µ½£¬ÔÚv5.5×óÓÒʱÓÐÒ»¸ö½»µã£¬Ò²¾ÍÊÇÎÒËùÐèÒªµÄÖµ...

ÄãÕâ¸öÎÊÌâÓÉÓÚÉæ¼°µ½PI£¬ÐèÒªÖ¸¶¨¼ÆË㾫¶È¡£Ó󣹿µü´ú·¨ºÜÄÑÊÕÁ²£¬ÒÔϳÌÐòÏ£ÍûÄÜÓÐËù°ïÖú¡£
>> for v=5:0.00000001:6;
f=14*pi*sin(v/2)/3;
if abs(f-v)<=0.000001
break;
end
end
>> vpa(v)

ans =

5.5122612

>> vpa(f)

ans =

5.5122622

>>

» ±¾ÌûÒÑ»ñµÃµÄºì»¨£¨×îÐÂ10¶ä£©

Ò»´Î´ÎƼˮÏà·ê
8Â¥2012-07-07 11:09:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 11 ¸ö»Ø´ð

²»ÊDz»Ïë

гæ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

s=solve('sin£¨v/2)-3*v/14/pi=0 ')      ÊÔÒ»ÏÂ
2Â¥2012-07-06 14:13:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

luomia

ľ³æ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

>> s=solve('sin(v/2)=3*v/14/pi');
>> s

s =

0
Ò»´Î´ÎƼˮÏà·ê
3Â¥2012-07-06 15:02:39
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhaoyanqiao

Ìú³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by ²»ÊDz»Ïë at 2012-07-06 14:13:07
s=solve('sin£¨v/2)-3*v/14/pi=0 ')      ÊÔÒ»ÏÂ

>> s=solve('sin(v/2)-3*v/14/pi=0 ')

s =

14/3*sin(0)*pi

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