BITSAT SERIES Mathematics
Addition Of Vectors
2 previous year questions.
Volume: 2 Ques
Yield: Medium
High-Yield Trend
1
2021 1
2010 Chapter Questions 2 MCQs
01
PYQ 2010
medium
mathematics ID: bitsat-2
With respect to a rectangular Cartesian coordinate system, three vectors are expressed as
a = 4 i- j, b=-3 i+2 j and c=- k.
The unit vector along the direction of sum of these vectors is
1
1\sqrt3( i+ j- k)
2
1\sqrt2( i+ j- k)
3
13( i- j+ k)
4
1\sqrt2( i+ j+ k)
02
PYQ 2021
medium
mathematics ID: bitsat-2
Let a, b, c be non-coplanar unit vectors equally inclined to one another at an acute angle θ.
Then | a+ b+ c| in terms of θ is equal to
1
(1+cosθ)√(cos 2θ)
2
(1+cosθ)√(1-2cosθ)
3
(1-cosθ)√(1+2cosθ)
4
None of these