CRYING DOLPHIN
PCXPwindows8ѹĤޤΰ㤤⤢ޤƤʤ(
ƤΤľˤޤǤäƤꡢFTPꤹ齪äƤʤȤ
(ĿŪǿʤǤȤν1餤)

ꡢǯλ辡ʤӤH12γطݤǽФ޷ƱǤ͡
(äȤ⡢٤ǤϤʤѤǤ)

ä̵ǤȬѷѷǹͤޤ
(ľջѷμդꤷѷѷ)
ï⤤ʤԳϡ 103ڡ 0:15:03 HomePage:֥⤢40951
Ĺ
45Ǥ⤨㤦ʡ
Ϥޤޤġ 103ڡ 0:19:02 HomePage:åλؤ40952
kasama
(~~;)󡢲򤬣Ĥ褦ʡ
103ڡ 0:19:59 40953
kasama
#40952
⤽פޤIJФǤϡ
103ڡ 0:21:01 40954
AD©
¤ޤ֤ƤߤơǽΤꤽʳ٤ջ򸫤ĤޤֵǼˡפȤΤϵǤ
˵𤷤Ƶסˣ˲ޤťϤƤޤ󤬼ӤӾ֡īʹߤˡֱŪפ˹ͤľƤߤȻפޤ
103ڡ 0:21:21 40955
ѥ
Τ100/4=25ȲơܡäȤƤޤʾСˡ
ۥȤ45ǤդƤ褦ʡ
103ڡ 0:22:44 40956
ޥ
ޤä֢C߳ѡפȤ˺Ƥޤޤ....orz
iMac 103ڡ 0:29:11 HomePage:40957
ģ©
᡼ƽƤ֤˳󤫤ʣ񤭹ߤޤΤˣ٤ϣˤΤ褦ʡȤꤢ⤦դǤޤäΤīͤޤ
103ڡ 0:30:19 40958
ޥ
ޤɲäƽޤm(__)m
iMac 103ڡ 0:36:30 HomePage:40959
ߤ
̤£äʿԤ£äαĹ˸äƿ򲼤
ȤʤȤʤľѤʬƤΤʡäƴǤɤϥǤߥޥ

Ǥϳ٤ˤʤ뤳ȤϤۤȤɤʤä褦˻פΤǤ
ճȽꤵƤΤǤ礦
103ڡ 0:38:05 40960
⡼ޥ
äȤ...^^;
A濴ˤB̤ߤͤ...
ACȱߤȤθC'Ȥ...
ʿ...BC'=6 Ȥ狼...
BCC'ջѷ...
ABC'ջѷ...
180=(2*3+2)
=180/8=22.5

äȥޡȤʲˡ˰㤤ʤΤ͡
103ڡ 1:08:57 40961
⡼ޥ
դ...^^;
⤵3...BA򿭤Фľ¤BC򿭤ФߤȤʬľѤʤΤ...6cmȤ狼ޤ ^^
ŪˤϡоΤʤΤ...BC'=6
103ڡ 1:14:20 40962

򤤤ȤϴǤ(` )

http://uploda.cc/img/img524c500f42b76.jpg

οޤĹطʤ45/4뤬ޤޤְäƤޤ(` )
103ڡ 1:58:03 40963

BC'AľѤäƤݾڤʤΤ

45/2δְ㤤Ǥ^^;
ܡ 103ڡ 2:44:36 40964

AγѤΣʬBC˲­D,
ABCαĹ˲­EȤ
AE=3B=, CAE=Ȥ롣
ADC=, ACE=Ǥ롣

ACĹƢABC'ջѷȤʤ褦ˤ
ADαĹBC'θD'Ȥ
ADEᢤBDD'ᢤC'DD'
BC'=2BD'=2=BCȤʤ
BCC'ջѷǤ뤳Ȥ狼롣
ƱʳѤӤ
BCC'=ACE=
BC'C=ABC'=
2ĤƱʤΤǢ==R/4=22.5
103ڡ 2:22:07 40965
ģ©
Ϥ褦ޤ
ʧäƲ򤯤ȤϤŪȤƸǤʤȤ

긵ΥǤϡ£äαĹ˿򲼤­ФȤ
ˣ¤ޤ֤ƣáǤȣСǤꡢãáǤ
Ƥޤִݡᣱ٤ǻѴؿޤᤤ׻ִݡᣳ٤
׻ʤϤ㤦Ƚǡˡˣ٤Ƿ׻ĤĤޤ礦Ȥ򤷤Ƥޤ

ŪǤ͡Ѥǰ
103ڡ 5:52:22 40966
ϥ饮㡼ƥ
Ϥ褦ޤMathematicaǤ򤬤Ф
ϫޤ
103ڡ 7:21:47 HomePage:湩ؤ˥40967
̴
B¤ȤʬACȤޤABCȤ6/sin2=x/sin,cos=3/x.ȤǡAʬBC˿򤪤θDȤȡCAD=¤Ȥʤ롣ACD=3¤Ǥ뤫顢4=90롣äơ=22.5
ٻΤ桡 103ڡ 8:34:30 40968
ڥ륽
꤫Ǥ
103ڡ 10:33:19 40969
tk
ABCBC򼴤ޤ֤AоAǤȤ롣
BAǤȡAʬȤθD,BAǤACαĹȤθCǡBCαĹAA'θEȤ롣

ABCᢤBADAD=6ADAǤջѷΤˡAAB=<ADA=*3ޤACE=*3
ΤˢAECAA'C'AC'ϡDAA'ʬ
103ڡ 12:05:16 40970
uchinyan
Ϥˤϡơϡ
ǽ򸫤Ȥϻפ鷺ѴؿȤäƤޤޤǹͤľƤʴ
ѤλȤ˾ͤޤ

A BC ˿򲼤ȡC = ACB > 90ʤΤǡ­ BC αĹˤޤ H Ȥޤ
ˡB BAC ʬ˿򲼤­ DBDAC 줾αĹθ EȤޤ
ޤABC = BC * AH * 1/2 = 9 cm^2BC = 6 cmꡤAH = 3 cmǤ
ˡ٤δطʤɤ顤BAHABDAED ϹƱǡBD = ED = AH = 3 cmǤ
ǡBE = BD + ED = 6 cm = BC ȤʤꡤBCE ջѷ
BCE = BEC = AED = ABD = BAH = 90- ABH = 90- ABCǤ
ǡBCE = ABC + BAC = ABC + ABC * 2 = ABC * 3ʤΤǡ
ABC * 3 = BCE = 90- ABCABC * 4 = 90롤B = ABC = 90/4 = 45/2 = 22.5
ˤʤޤ

ʤߤˡ
C = 90ΤȤϡʤ
C < 90ΤȤϡE = CD BC ȤʤꡤB = 45롤
Ǥ͡
ͥνȡ 103ڡ 12:49:58 40971
uchinyan
ǼĤɤߤޤ
Ͼ񤷤ä褦ǡ󡤤ȹפƤ褦Ǥ

#40951
ä̵ǤȬѷѷǹͤޤ
(ľջѷμդꤷѷѷ)
ȤˡޤΤäƤ뤫Ǥ롤Ȥ⤹ˡʤ(^^;

#40961
A濴ˤB̤ߤͤ...
ACȱߤȤθC'Ȥ...
#40962
⤵3...BA򿭤Фľ¤BC򿭤ФߤȤʬľѤʤΤ...6cmȤ狼ޤ ^^
ŪˤϡоΤʤΤ...BC'=6
ȤˡץϾ㤦ΤΡ¼#40971Ʊʡ

#40965
AγѤΣʬBC˲­D,
ABCαĹ˲­EȤ

ACĹƢABC'ջѷȤʤ褦ˤ
ADαĹBC'θD'Ȥ
ȤƹͤˡץϾ㤦ΤΡ¼#40971Ʊʡ

#40970
䢤ABCBC򼴤ޤ֤AоAǤȤ롣
BAǤȡAʬȤθD,BAǤACαĹȤθCǡBCαĹAA'θEȤ롣
Ȥƹͤˡ
äȤ褯ʬʤΤǤBAE = BAA' = BA'A = AA'B = B * 3Ȥäᤤ

#40971
A BC ˿򲼤ȡC = ACB > 90ʤΤǡ­ BC αĹˤޤ H Ȥޤ
䤵ˡB BAC ʬ˿򲼤­ DBDAC 줾αĹθ EȤޤ
Ȥƹͤˡ

#40967#40968
ؤˤˡ

#40955#40960#40963
Ĵ٤ơܴˤˡ (^^;
ͥνȡ 103ڡ 13:55:30 MAIL:uchi@sco.bekkoame.ne.jp 40972
Ȥ
ɸB(0,0),A(a,3),C(6,0)Ȥ;
(6-a)^2+9=a^2+9+36-2*sqrt(a^2+9)*sqrt(a^2-12*a+45)*cos(ABC)
cos(ABC)=a/sqrt(a^2+9)
cos(2*ABC)=(a^2-6*a+9)/(sqrt(a^2+9)*sqrt(a^2-12*a+45))
cos(2*ABC)=2*cos(ABC)^2-1
(a^2-6*a+9)/(sqrt(a^2+9)*sqrt(a^2-12*a+45))=(a^2-9)/(a^2+9)
(a^2-6*a+9)*(a^2+9)=(a^2-9)*sqrt(a^2+9)*sqrt(a^2-12*a+45)
ǡxmaxima
solve((a^2-6*a+9)^2*(a^2+9)^2-((a^2-9)*sqrt(a^2+9)*sqrt(a^2-12*a+45))^2,a)$
a:rhs(part(%,2))$
expand(a^2+9)$
sqrt(%)$
factor(a/%);(sqrt(2)+1)/(sqrt(2)*sqrt(2+sqrt(2)))=sqrt(2+sqrt(2))/2=cos(ABC)
ABC=45/2١()
103ڡ 14:02:22 MAIL:fttnm528@ybb.ne.jp 40973
̤ꤹ
#40973
sqrt(2+sqrt(2))/2=cos(ABC)ABC=45/2٤ϤɤäƳФΤʤ
sqrt(2+sqrt(2))/20.9238
cos(45/2)0.9238
Ʊ顩
103ڡ 15:22:46 40974
Ȥ
#40974

ȾѤθ
cos(45/2)^2=(1+cos(45))/2=factor((1+sqrt(2)/2)/2)=(sqrt(2)+1)/2^(3/4)=(2+sqrt(2))/4
cos(45/2)=sqrt(2+sqrt(2))/2 Ʊ!
103ڡ 17:15:28 40976
Ȥ
#40976

>(sqrt(2)+1)/2^(3/4)
ѤΤȤ쥹ߥ
(sqrt(2)+1)/2^(3/2)
˭ԡ 103ڡ 17:20:36 40977

BA'C=90Ȥʤ뻰ѷA'BC١˹ͤ롣
A'BCʬȡA'̤BCʿԤθOȤȾľBA'DȤȤȡ
A'O//BCA'OϢDA'Oʬ
äOϻѷA'BC˵ܱߤ濴ǤꡢOCA'=(180-45)/2=75
OBC=22.5롢BCO=112.5롢BOC=45껰ѷOBCʸξOA˰ס
103ڡ 21:02:08 40978

ĤäǤ
ϲȤʤǻƤޤޤ
ꡢץǤ͡
繥Ǥ
103ڡ 21:33:12 40979
P
Ʊ޷Ǥ 274 񤷤Ȼפޤ
104ʶ 14:36:57 40980
ޥ
#40980
Ʊ޷...ʥåΤ...ޤƱǤϤʤƤ褫äǤ
iMac 104ʶ 15:26:28 HomePage:40981
abcba@baLLjugglermoka
Ūˡ
ABCBC򼴤ޤ֤ơAбA'Ȥ롣AA'=6Ȥʤ롣ABCDAA'Ȥʤ褦ˡBA'αĹDȤȡABDAB=ADջѷˤʤ롣

٤δط顢7ߢABC+A'AC=180롢3ߢABC+A'AC=90ꡢ
4ߢABC=90ȤʤꡢABC=22.5

¿ʬ¾βˡȤ֤äƤϤʤȻפΤǤ.....

ѥŪˡϰϤdz٤׻ǤȤ顢ABCޤϢBAC304560Τɤ줫ˤʤꤽABCդ6ǹ⤵3ʤΤǡդȹ⤵椬2:1ˤʤΤǡɤABCޤϢBAC45ˤʤꤽBACʬBCȤθDABCαĹ˿򤪤ƤΤHCAHEAHȤʤEȤȡDH=3ȤȡBD=CH+3=EH+3=DEAD=EDȤʤ礦

105ڡ 12:45:24 40982
Mr.ǥ
ľ£ä˲ȡȤȡȡ3
ܣ¡Ȥ
ꡡ6/sin2/sin
á6*sin/(2sincosˡ3/cos
äơܣãȡ
ܣ¡ܢܣ£ȡ390
衡ܣ¡90/422.5

ѡ񤷤äǤʻŪˡϡ⤦ǴäƤߤޤ
106 2:08:07 40983

ŪˡϼʬǤ
ߤʤβˡ򸫤ƻפäȤ
40972uchinyanοޤǡʤޤ󤫤äƤ˻Ȥ碌Ƥޤ
£ãŤջѷܣ£ãšܣ£ţáᣳ
£Ťջѷܣ㣚ᣲ
äƢ£ãŤѤ¤ᣱ
äơᣲ
⤵ۤ¿ʤޤ򸫤аܤǤ狼Τǥޥ뤵򤢤ǤϤʤͽۤޤ

107ʷ 17:21:12 40984

ŪˡϼʬǤ
ߤʤβˡ򸫤ƻפäȤ
40972uchinyanοޤǡʤޤ󤫤äƤ˻Ȥ碌Ƥޤ
£ãŤջѷܣ£ãšܣ£ţáᣳ
£Ťջѷܣ㣚ᣲ
äƢ£ãŤѤ¤ᣱ
äơᣲ
⤵ۤ¿ʤޤ򸫤аܤǤ狼Τǥޥ뤵򤢤ǤϤʤͽۤޤ

107ʷ 17:21:16 40985

Ƥޤäˡޤ
£ãŤѤ¤ᣱ
107ʷ 17:23:06 40986