ѷ޳ѷȤ߹碌ȾʬǤ͡
108-6102
ܿĻԡ 822ڡ 0:07:11 HomePage:̣λ40826
abcba@baLLjugglermoka
#40826
Ǥ͡򸫤ִ֡54٤ФƤѷؤäƤͽۤĤޤꥢ륿˿ʬ٤줿塢׻ߥǰޤΤǾǰǤ
822ڡ 0:11:36 40827
ߤ뤯
ѷ޳ѷˤĤѥ󤬤ʤΤˤǽФƤϤ

٥åȤ鹲Ƥӵ⤦޿ͤ餤ɽ̾ޤȤ
822ڡ 0:15:27 40828
mukku
ʤۤ
822ڡ 0:19:01 40829
ߤ뤯
http://www.sansu.org/used-html/index467.html
ǤͲǸäƤ
822ڡ 0:20:07 40830

С顼ʤʤ줺䤭⤭ޤʾС
822ڡ 0:25:53 40831
ߤ
#40826
޳ѷ£ţƣĤγ¦ѷģƣä򤯤äĤ롢ȤȤ
¿ѷȤ߹碌޷γϤ֡ʤΤʤв򤱤ʤ
Τdzμ¤˲ƤǤ͡

Ǥ⡢˵դޤǤʴ
822ڡ 0:29:55 40832

#40831
ͤ⤽Ǥ()
ܿĻԡ 822ڡ 0:33:12 HomePage:̣λ40833


BAC96ǤϤʤΤǤ礦
BAD102Ǥ͡
ϢBACΤϤǤ

ʤߤջѷ򤭤ȤäƤäĤޤ
822ڡ 1:37:37 HomePage:40834
⡼ޥ
äȤ狼ޤ ^^;
Ǥ˷ǼĤˤ񤫤Ƥޤ...
޳ѷΣդѷ򤯤äĤ...
оΤʤΤʬ䤵...

60-2*6=48
180-54-48/2=102

Ǥͤ
822ڡ 2:14:40 40835

ְ㤤˵Ť
AC=BCȻפǢACDҤä֤ƤäĤƤޤ
ʤ
Τ᲼δ㤤Ͼäޤ
Τä̤
102٤Ǥ
褯ɤޤʤ㡣㤤Ӥ
ʤǤ
822ڡ 2:51:41 HomePage:40836
Ȥ
xmaxima
B(0,0),A(1,0)ȤľBCA濴Ⱦsqrt(2-2*cos(168*%pi/180))
ȤCᢤABCγդcos;ǵ

e1:y=tan(54*%pi/180)*x$
e2:(x-1)^2+y^2=2-2*cos(168*%pi/180)$
solve([e1,e2],[x,y])$
part(%,2)$
rhs(part(%,1))$
rhs(part(%th(2),2))$
factor((%o5-1)^2+%o6^2)$
factor(%o5^2+%o6^2)$
float(factor((1+%o7-%o8)/(2*sqrt(%o7))));-0.20791169081776
cos(102*%pi/180)ƱʤΤ
float(%-cos(102*%pi/180));-0.20791169081776
102١()
˭ԡ 822ڡ 3:27:53 MAIL:fttnm528@ybb.ne.jp 40837
̤ꤹ
#40837
> cos(102*%pi/180)ƱʤΤ
cos(1*%pi/180),cos(2*%pi/180),ȻƤäơ102ܤcos(102*%pi/180)ǥӥ󥴡äƤȤǤ
822ڡ 8:40:13 40838
uchinyan
Ϥˤϡơϡ
ࡤդнֻʤǤ𤱤ʤȤ˷빽ͤǤޤޤɡʴ

դĹФ޳ѷͤΰդƱդĹФѷ򤯤äĤޤ
ơѷ޳ѷȶͭƤʤĺ Cȸ礦޳ѷĺ B
޳ѷ B ٤ĺ AA C δ֤ζͭĺ DȤȡ
޳ѷΰĤѤ 108롤ѷΰĤѤ 60ʤΤǡ
ABC = 108/2 = 54롤ADC = 108+ 60= 168롤Ȥʤäơοޤˤʤޤ
ǡBAC = 108- (180- 168)/2 = 108- 12/2 = 108- 6= 102롤ˤʤޤ
ʤޤΰϡDAC ߳ѻѷ AB < AC 餫Ǥ͡
ͥνȡ 822ڡ 10:46:22 MAIL:uchi@sco.bekkoame.ne.jp 40839
uchinyan
ǼĤɤߤޤ
ϡ޳ѷγ¦ѷ򤯤äĤ롤ȤˡΤ褦Ǥ
ʤ#40830޳ѷ¦ѷ򤯤äĤ롤Ȥϲ򤤤ƤϤǤä˺Ƥޤ (^^;

轵Ϥ٤ߤʤǤ͡٤ߵ٤ߤʡ
ͥνȡ 822ڡ 10:58:20 MAIL:uchi@sco.bekkoame.ne.jp 40840
ϥ饮㡼ƥ
٤ʤޤѴؿǤMathematicaDz򤭤ޤ
822ڡ 16:23:27 HomePage:湩ؤ˥40841
Ȼ
衹ΣȣϣУţ̿Ʊޤ򸫤ޤ
822ڡ 18:36:19 40842
ѥ
ɤǸ褦ʡפäƤޤ
ߤ뤯ΤŦ̤Ǥ
823ʶ 0:57:05 40844
Ȥ
#40838
ΤȤ
-(sqrt(-(2*tan(3*%pi/10)^2+2)*cos(14*%pi/15)+tan(3*%pi/10)^2+2)-tan(3*%pi/10)^2)
/(sqrt(2)*(tan(3*%pi/10)^2+1)*sqrt(1-cos(14*%pi/15)))
ѷcos(102*%pi/180)ˤȤǤ
ΤȤϻ֤äƤߤޤ
˭ԡ 823ʶ 6:14:20 40845
̤ꤹ
#40845
> ѷcos(102*%pi/180)ˤȤǤ
Ϥ᤿褤⡣ʤȤ⤫Ķ۴ؿʤΤǡ¤߳줿ʤȤͤ(^_^;) áǤ⥴Ȥ⤵ʤǤ뤫⡩ФäƲ͡

ǤΤȤƤ⥹ޡȤǤؤǤǤʤϤޤ󡣤㤯ԺٹǤˡ񤤤Ƥޤ

AB=LȤȡAC=2*L*cos((180-168)/2)=2*L*cos(6)ȤʤäơABCŬѡ
2*L*cos(6)/sin(54)=L/sin(180-54-x)
sin(180-54-x)=sin(54)/2cos(6)=sin(3/10)/2cos(/30)
ǡ
http://mathworld.wolfram.com/TrigonometryAnglesPi10.html sin(3/10)=(1+5)/4
http://mathworld.wolfram.com/TrigonometryAnglesPi30.html cos(/30)=(7+5-(30+6*5))/4
顢αդϡ
(1+5)/4 / 2ߢ(7+5-(30+6*5))/4=(-(5+5)*6+5+7)/4
Ǥhttp://mathworld.wolfram.com/TrigonometryAnglesPi15.html ꡢͤsin(2/15)ʤΤǡ
2/15=180-54-x2*180/15=180-54-xx=102
823ʶ 16:17:37 40846
Mr.ǥ
total access 8,040,000˥ҥåȤޤʤʤ򤷤ʤޤ
Ǥ͡Ρ򤵡פӡּɤפޤǿФΤǤ礦
ޥ뤵󡢤ĤڤޤƤäͭ񤦤ޤ
(¤ʤ³ƤȤ˾ޤ)
829ڡ 0:57:53 40847
ޥ
ɤƤޤʥӡιԤǤ

> Mr.ǥ

꤬Ȥޤޤ³ƤޤޤΤǡͤޤm(__)m
ɡ 829ڡ 15:53:00 HomePage:40848
粬ҹ
פ֤ޤ޳ѷѷǤ
롼ᣱ롡
̿ؤˤϽֻϤä⤷ޤ͡
ꥢ륿ࡣࡢǯŤͤƤ黲äƤޤ͡ǯˣ󤯤餤ϻäǤ͡ʡ
830ʶ 17:56:50 40849

ޥ뤵󡢥ɤǤԤäƤߤǤ͡
ǤǤ͡ǯۤɥޥ˻äƤƤޤʬˤȤäƤ⣱֤ΥꥺˤʤäƤơΤ褦ˤʤϲĤ褦夭ޤ
äѤޤԤΥ饪Źξꥸ󥱥Ϣ¤Ȥڡ򤷤ƤޤξξξȤ⣲󾡤ƤФȤΤǤʤǤˡ롼פǤɤ龡Ƥ뤫ȤäˤʤޤŹΩ줫餹ȤǤ⤤櫓顢Ҥξ㤦ΤФ(Ȥ¿Ȥ󤬤ˤŹϣܤξƱΤФƤɤ餫μ꤬ĤΤͤäƤ飱ܤƱΤФ
ܤϤɤ餤ȤȤǻڤȤʤꡢºݤϣܤξꥸ󥱥ξȤ餱Τǽˤʤޤ
ɬˡ̵ȤƤҤijΨ⤯ʤФäƤäΤǤ礦
831ڡ 10:35:09 40850