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1128ڡ 0:19:29 48571
ǯ
BPCʬ򼴤ˤƭABPȿžơAιԤA'Ȥ
APA'ѷ
ACPA'οľʬȤʤΤǡACPϢA'CPȾʬ10
1128ڡ 0:40:39 48572

У£ä£äޤ֤Ƣѣ£äѤ֤ȡ£Ѥѷˤʤꡢܣ£ѡ᣶롢ѡ£ѡãѡѣäջѷȤʤꡢܣãСȤȢܣѣãܣѣáᣴܣᡣ£äѤ¤
ܣ£áܢܣ£ãܢܣã¡ᣴܡʣܣˡܡʣܣˡᣱäƣᣱȤʤޤ
1128ڡ 0:52:01 48573
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£äФƣФоΤѤȤꡢѷ£Ѥѷѡѣädzѣѣá140-6080ʤΤdzѣãѡ50äƳѣãС50-20210Ȥʤޤ
1128ڡ 1:02:48 48574
å
ʤȤ褿
1128ڡ 2:16:04 48576
Ȥ
ǽa=20Ȥ
ɸP(0,0),A(-1+cos(a),sin(a)),B(-1,0)
C(cos(2*a),-sin(2*a)),D(2*cos(2*a),0)Ȥ
ľCDη:sin(2*a)/cos(2*a)
ľCAη:-(sin(a)+sin(2*a))/(cos(2*a)+1-cos(a))
ηѤ
(sin(2*a)/cos(2*a))*(-(sin(a)+sin(2*a))/(cos(2*a)+1-cos(a)))
Maxima ѷ
factor(trigreduce(trigsimp(trigexpand((sin(2*a)/cos(2*a))*(-(sin(a)+sin(2*a))/(cos(2*a)+1-cos(a)))))))$
factor(ev(%,cos(3*a)=1/2));-1
ľAC,CDľ򤷤ƢDCA=90
ǢPCDƱ٤402ջѷ
PCD=100ꡡPCA=PCD(=100)-DCA(=90)=10롦()
˭ԡ 1128ڡ 3:03:03 MAIL:fttnm528@ybb.ne.jp 48577
ȤޤԤ
ѷԥȤޤǤ褷ޤ
1128ڡ 4:59:56 48578
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1128ڡ 7:14:16 48579
ˤ
Ʊޤ֤ơѷޤ
Ķļˡ 1128ڡ 7:37:42 HomePage:ޤޤ48580
Ȥ
2ˡǤޤ٤ϺɸǤʤ
βˡ׻ˤʤޤ!!

֤դĹ1ȤAP=2*sin(10)
ľAPC򲼤­DȤ
PD=cos(40),CD=sin(40) ꢤADC
tan(CAP)=CD/AD=sin(40)/(2*sin(10)+cos(40))
sin(30+10),cos(30+10)ȤƲˡȤ
sin(40)/(2*sin(10)+cos(40))
=(sqrt(3)*sin(10)+cos(10))/(3*sin(10)+sqrt(3)*cos(10))
2褷1/3sin(40)/(2*sin(10)+cos(40))=1/sqrt(3)
tan(30)ꡡCAP=30
ޤAPC=360-(180-20)/2-(180-2*20)=140ꢤAPCǻĤγѤ
ACP=180-CAP(=30)-APC(=140)=10롦()
˭ԡ 1128ڡ 20:48:11 MAIL:fttnm528@ybb.ne.jp 48581
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ʤΤʤ飱ꤵƤޤ

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ԡ 1128ڡ 21:20:19 MAIL:tfuruya@aria.ocn.ne.jp HomePage:湩ؤ˥48582
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ޤäΤ򸵤ᤷơƱޤܤǼȿ¦򸵤ޤȡ2示餷ƽŤͤˤʤޤΤȤդŤϡȿľդ¤ƱˤʤޤäƣУ+ӣѡң+ԣӡ
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1129ʶ 2:58:36 48583
鯤ο
ABP2ʬlȡBPC2ʬmθOmBCθMȤ롣
ȡAOBBOMMOC60
顢A,O,Cϰľˤʤ롣ĤޤꡢOmACθ
ACPOCP180-OBC-BOC-PCB180-30-120-2010
//

ABPBlˤĤƤޤ֤
PBPCmˤĤƤޤ֤
ޤ֤2ιϲžǤꡢξ硢
lmθOȤȡBOM60ʤΤǡ
ѴABPCϡO濴Ȥ120žˤʤޤ

ξ硢OACΤǡ嵭Ωޤ

1129ʶ 3:14:44 48584
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ˡ10ǷǼĤ뤫򸫤ΤĤ꤬
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#48578 ȤޤԤ
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somewhere in the world 1129ʶ 22:24:31 48585
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ࡪ޷Ϸ㡪ѴؿߤǤ
1129ʶ 14:15:45 48586
ޤ
#48570 kyorofumi

ޤޤ

somewhere in the world 1129ʶ 22:22:16 48587
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˺ǯǤ12/8ˤ17:00ȤʤäƤޤ

ʲܺ١񤤤㤤ޤǤפǤΤǡʤǤ⡢ΤϢȤ꤬Ǥν...С

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ۡ12/ 8 17:00
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ʪǤʤ800ߡդ餤ʤΤǤ٤500ߡդ
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ϡȤѥ绮̤Ѱդޤʺǽˤ2,000ߤ˴ޤޤޤˤ䤪ۻϻ߼ͳʤΤǡդ䡢ΤΤϡɤɤ󤪻ޤ

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ˣͤ2,000ߤĺפȤϣ500ߤǤ٤ʧʥå奪ˤʤޤǯʤΤǤݤޤʤݤô뤳ȤˤʤԸʿä뤿Ǥ
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125ڡ 14:51:18 48589
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