CBSE Guess > Papers > Important Questions > Class XII > 2011 > Maths > Maths By Mrs. E.Praveen

CBSE CLASS XII

Vectors-3D-Lines (1Mark)

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41. Three vectors satisfy the condition Evaluate the quantity
42. The Cartesian equations of a line AB are . Find the direction ratios of the line AB.
43. Find direction cosines of a line which is equally inclined with the axes.
44. If a line makes angles ∏ /4 with each of X –axis and Y-axis, then what angle does it makes with the Z- axis.
45. If | a + b | = | a - b | then find the angle between a and b
46. If a is a unit vector and ( x - a ).( x + a ) = 8 , then find | x |.
47. What is the angle between vectors with magnitude respectively?
48. If a is unit vector and (x – a). (x + a) = 8, then find |x|.
49. Find a unit vector perpendicular to each of the vectors
50. If
51. The Cartesian equation of a line AB is . Find the direction cosines of a line parallel to AB.
52. If and , find a unit vector parallel to the vector
53. Find the direction cosine of the line which is perpendicular to lines whose direction cosine are proportional 1,-2,-2 and 0,2,1

Submitted By Mrs. E.Praveen
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