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Recent questions in CBSE XII
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CBSE XII
CBSE XII
Math
Physics
Chemistry
Biology
Prove that $$(\overrightarrow{a} + \overrightarrow{b} ) ⋅ (\overrightarrow{a} + \overrightarrow{b} ) =| \overrightarrow{a} |2 + | \overrightarrow{b} |2$$ if and only if $$\overrightarrow{a} , \overrightarrow{b}$$ are perpendicular, given $$\overrightarrow{a} ≠ 0, \overrightarrow{b} ≠ 0$$
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
If $$\overrightarrow{a} ,\overrightarrow{b} , \overrightarrow{c}$$ are mutually perpendicular vectors of equal magnitudes, show that the vector $$\overrightarrow{a} + \overrightarrow{b} + \overrightarrow{c}$$ is equally inclined to $$\overrightarrow{a}, \overrightarrow{b} and \overrightarrow{c} $$.
cbse
class12
ch10
sec-b
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Given $$\overrightarrow{a}, \overrightarrow{b} and \overrightarrow{c}$$ Find a vector $$\overrightarrow{d}$$ which is perpendicular to both $$\overrightarrow{a} and \overrightarrow{b}, and \overrightarrow{c} ⋅\overrightarrow{d} = 15$$
bookproblem
cbse
class12
sec-a
easy
ch10
math
asked
Nov 2, 2012
by
anonymous
0
answers
Show that the direction cosines of a vector equally inclined to the axes OX, OY and OZ are $1 / \sqrt{3}, 1 / \sqrt{3}$ and $1 / \sqrt{3} $
cbse
class12
bookproblem
sec-a
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
The two adjacent sides of a parallelogram are given. Find the unit vector parallel to its diagonal. Also, find its area.
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Find the position vector of a point tand show that P is the mod point of the line segment
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Show that the points A (1, – 2, – 8), B (5, 0, – 2) and C (11, 3, 7) are collinear, and find the ratio in which B divides AC.
cbse
class12
bookproblem
sec-b
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Find a unit vector parallel to the vector....
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Find a vector of magnitude 5 units, and parallel to the resultant of the vectors
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Find the value of x for which $$ x(\hat{i} + \hat{j}+ \hat{k})$$ is a unit vector
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
If$$ \overrightarrow {a} = \overrightarrow {b} + \overrightarrow {c} $$ If this is the case, then is it true that $$ |\overrightarrow {a}| = |\overrightarrow {b}| + |\overrightarrow {c}| $$
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Determine the girl’s displacement from her initial point of departure.
cbse
class12
bookproblem
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
0
answers
Find the scalar components and magnitude of the vector joining the points $P (x_1, y_1, z_1)$ and $Q (x_2, y_2, z_2)$.
cbse
class12
bookproblem
sec-a
easy
ch10
math
asked
Nov 2, 2012
by
balaji.thirumalai
1
answer
Write down a unit vector in XY-plane, making an angle of 30° with the positive direction of x-axis.
cbse
class12
bookproblem
ch10
concepts
toolbox
sec-a
easy
math
asked
Nov 2, 2012
by
balaji.thirumalai
1
answer
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