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kh) is 30. If iJ and & represent unit vectors along the x, y ,,,, z-axes respectively, then the angle 0 between the Vector, |, E.2006) p47 4+hand 7 + 7 is equal to:, ctors . l (b { : ), (a) sin{ | ) cos | V3, between “, (¢) cas-1( 7} (d) 90°. (A.M. U. 2009), 31. The magnitude of the component of the vecrg,, cs 5 |. A meh — Lay, correct? = ) —, : (a) 3 (0) ;, 18, (ce) 3 (d) . (Kerala 20] 0), '___ | 32. The value of A for which the two vector,, 2009) np A A A —_ A A A, A A a=5it+Aj+h and b=i1+-2j+k are perpen., Pek dicular to each other is, form (a) 2 (2) -2, (od 3 (dy —3. (WB. 2010), lar to + > >, 33. If a+ b =c and a+ b= c, then the angle included, > >, between a and 6 is, | (a) 90° (4) 180°, 2014) (c) 120° (d) zero. (WB. 2010) |, ot 34. Which of the following pairs of vectors are parallel ?, , LD A A, , —_ A, , GA = 7-27) 3 = i-5;, = \ Wo? A A, , (4) A=i-10j;B =2i-5;, => A N, , () A=, , , , , , , , > A A, i-5j;B = i-10j;, , > A Ae A A, (@) A = i-5j;B =2:-10) (A.M.U 2014), , ; => a Ae, Consider three vectors A =i + j-2h, B=i-j+k, , a ATA UA >, and C =2i-3j+4k. A vector X of the form, > =, _ a@A + #B (Oand B are numbers) is perpendicular to, _ _C. The ratio of o and f is, a ; (a) os (6) 2:1, ~ @- (2)3:1 (WBJEE. 2014), , mh A A A, en the vector p = i + j + & and unt, , , , , , , , , , a : 1, ) cos” (3), , (MELCET. 2014), , 2, , , , , , P, , : —_—>, , : A a!, yector $, , Two in, , aye, , B a acosmt? +’, , ot, @ = n/6 rad S, pet for the first, , me, 40. Two vectors A 2, , >, magnitude of (A, >>, (A-B). The ang, , i. al, , wus, , , , n+1