Question n.o 59 Q.57 If three unit vectors b, are such that
6
åx(bxé)
then the vector a makes
2'
with b and respectively the angles
(A) 400, 800
(C) 300, 600
(B) 450,
(D) 900, 600
Q.58 If the vectors and 6 are mutually perpen
(äx6)}} is equal to
dicular, then ax äx äx
(A) lä12b
(C) lä14b
(B) lä13b
(D) lälb
Q.59 Given the following simultaneous equations
for vectors and
Then i =
(0 b,ä-b
(3)
(D) None of these
ä x b] is equal to"
