Page 203 - Math Grade 12 (Advance)

PROEUS DARA

n. (10, 3, --2), x=4t-2, y= 3, z= t+l

2. (4, I, -2) , X = 2t + 2 , y = 2t , z = t- 3 '1
12. nbtH'i'i:32Stlln OABC mb E dlGMUnruTlbliCS'idb [AB] , F sb P tUnnb [OC]
.. 1 1 1 01 lJ ..
1 1 1
"" FO 2 .... PO 1 o o
sb [OAJ m'i:3~rnm'l'li- =- sb- =- '1 mm8tirt.nti Q tsitnhob [BCJ run
U FC I OA 2 1 l.J
--7 --7 .., 0 , " 1
BQ = tBC '1 m [PQ] 't3Hd~ [EF] nrt.flnnq~ t '1
13. 2'li'i:fHn 4 Grt.nfHti'ibFil 0, A, B sb c @stsinb'U~tn'i:3115 ttlirucrss~n s sb I
1 u ct ct 6\1 w tJ
1
tltC1mrun2M O<s< 1 sb O<t< 1 '1 mb M sb N dlGMunrunrulsnb&i [OA]
"'-" s s 1 01 n
Sb [BC] tQb~fflb P Sb Q dlGllijtitr:lblittinH~&i [AB] sb [OC] :nbQbffl'i:3
1
tirnmJu s trn 1 s Sb t &OJ I-t tUb~ '1
--7 --7 --7 ---7 .., 1 .... 0
n. 115n OR= aOA+~OB+yOC '1 tiblmiTH'U a+~=- Sb p = y tS18UMti R
l1l "" 2 1

2. ~nruQ2rJ.Qmmci2bf3liLm~htl1:3j2J MN UJM~sb PQ ?

14. nbun'i:32Stlln ABCD tr:lbli'i:flSidbtM I mb E dlGMUttifiidb [CD] :nbnbffl'i:3
ct 1 1 LJ ..... 1 l_j c;;
1 1 1 1
drutu]ti I trn 2 '1 115nGllijti F tsitrn0b [AD] ttlirumb G dlGlliJUUJhl~~tlb
1
[AE] Sb [CF] '1 ttfll15115n AF+AD = I +m tr:lru m=tO '1

~ ":) eJ Ql ~ ':1
2. ~nm~tS m tr:lrntg~u~ru BG 'i:flSnt~H'liJmi:fl '1

? ruunriiiqil 1

1. Qbu~~2Stlln OABC tr:lrt5'i:flS0bt~sb I mb M sb N d1GlliJUfH1.1Jlrt5~S0b

1 ""' --7 17 --7 7 .... ---7 7 1
[AB] Sb [OC] tUliJ5115n OA = a OB = b Sb OC = c '1
0 t ':1 eJ ----7 ___,.
n. nMnm'i:3drnl:1n.nn.ntrn NM · NB
"" 1 n
,....-....._.. "
2. IJ5n BNM = 8 '1 ~n61t'i:3 cos8 '1
ev
2 nbtin'i:32Stll61 OABC tr:lrutflSidbtMSb I mb P, Q sb R dlGMUttin'idb
... 11 lJ .... 1 lJ
1 1 1
[OA] , [OB] Sb [OC] :nbQbffl'i:3~rum]ti I +2 , 2+ I Sb 3+ 1 tUb~ '1
71
"" --7 7 --7 "' ---7 7
tUliJ5115n OA = a , OB = b Sb OC = c '1

0 I ':1 ...............
2. nMnnt~ cosRPQ '1

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