Page 205 - Math Grade 11 (Advance)

PROEUS DARA

3.4 ~ruti:fi9rlJ9M

t~§'i~u9~ lt = (x, y, z) -eru shoanu P tsinhnhn[1jru tt = ofo '1
1..11 IJ 1 "'
I
Q OcJ Ql Ql
run a, 13 sh y ctl~t1jrutn6H9Jhtt:llru z
OP ctl~rushHnJ (Ox) HnJ (Oy) shHnJ

(Oz) t{Jhff11jmti~hnii '1 m-e9Slr19sh't:f1H1
"' u u 6'l l_j
Qh~tmanfnh t~ms :
I
y
cosa =liP! , x = loJ>Icosa

cos()= liP! , y = lo:PI cos()

cosy= liP! , z = loJ>Icosy

t~ms
2 2
loJ>I = x + i + l
--71 2 2 ~ ? 0 :£: 2 2 2 --7p'2
'o
= 1 OP (cos a+ cos-(3 +cos-y) Sl ~ cos a+ cos f3 +cos y = loJ>I 2 =
2 2 2
1jt;£Sg cos a+ cos f3 +cos y = l '1
u
<I ~ --7
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m-e cosa , cos() sh cosy tsg ~mmnn !H\HttlnMSM ts~u9~ u = OP '1
IN tS- U I 1 1
s:: ~ 0 dJ
1. t~<:l'inHHt:lltStStirulti P ~ (-2, 6, 9) '1
1..1 u 1
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--7
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n. ~n9MtttlnhlSMts oP '1
U 1 I
2. t~§'inHHt:lltStSOrulu M ~ (2, 3, -6) '1
t.J u 1

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--7
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n. ~n9 Mtttl tSnf'US MtS OP
U I I
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