Page 207 - Math Grade 11 (Advance)

PROEUS DARA

4.1

1. t?i2Jrl~1u9~ tt sb t ttl ru lttl = f ' ltl = f sh e = 90° ttl ru e

m~dtg'"HHtllru1cr9~ tt sb t '1
11'1 'W 1
1
?irulSltiru?iCUHiJltru~tlh t_ Sb t '1
1 n
1?1
C) ? ""
1 7 1
2. t?i'\}tli,ufil~ u sb v ttlru u = J3 , v = "'3
:;:: "" 'il
r;;
?
C)
2
1. tt . t = I ttl x I tl cos e
= J2 x J2 x cos90° tn cos90° = 0
2 2
J2 J2
7 ?
u·v = -x-xO = 0
2 2
2. tt.t = lttlx[tlcose = 1xJ3xcosl20°

t_ · t = J3 X J3 X (-!) = - ~ '1
2 2 4

&?i~~tfilllilnr'!§bJ ABC ttlru'HlS~~hl~bt~ a '1
1

--? ---?
n. AB · AC
--? --?
~. AB · BC

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