Page 250 - Math Grade 11 (Advance)

PROEUS DARA

'W. zk =
5. 2. l+z+z z+ ... +zll = 0 .n."' 2( cos lln+l2kn .. lln+l2kn)
+ 1sm
7
18 18
k = 0, 1, 2
5n + 8kn . . 5n + 8kn
ti. zk = cos +Ism , k = 0, 1, 2, 3, 4
20

4. l. AB = 5 J2 2. n. AB = Jl7

4. AP = Jl37 , BN = 8 CM = J569 7 AC = 16 Btl m = '!!:
2 ' 2 'AB "~' 3
~
10. n. 'US'l~ 2x-y-3 = 0 2. 'i52'l01X=- 3
<: <: 2

r;; .)too
+ Ism-
4. n. (.J:J -1 = 2 1oo( cos 4n .. ·1n)
3 3
6. n. z = 1 + iJ3 z = - J3 + i , z 2 = -- 1- J3i , z = J3- i
0 1 3
'
8. ?1. 'US16'1 y = 1 b. Btl ti. y = X
<:

~
7
1. n. X = (13, 31, -34) 2. X = ( -6, -22, 26)
7
2. f=2 ,m=3,n=4 , p = (5, 6, 7)
3Ji -4Ji J2
3. n. cosa =ill cos~ = J:() cosy=-
2
'-3 2 2J3
2. cosa = - cosA = -- cosy = --
5
5 , 1-' 5'
4. n. (x, y) = (-130' _?}) 2.z = -- ! L.::it:HS186'lt'g 1x y z) - (- .!_Q - 23 - !)
7 u .... ,., -,3' 4' 7

245