A- 0- a-b - a-c-b - c

It is given that a≠ 0 and a×b = a×c a×b = a×c can be written as a× (b c) = 0 Now cross product of two vectors is zero when nbsp; nbsp; nbsp; nbsp; ...

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Byju's Answer

Standard XII

Mathematics

Cross Product of Two Vectors

a≠ 0, a×b = a...

Question

$\to a \neq 0, \to a \times \to b = \to a \times \to c \Rightarrow \to b = \to c$

True

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False

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Solution

The correct option is B False
It is given that $\to a \neq 0$ and $\to a \times \to b = \to a \times \to c$
$\to a \times \to b$ = $\to a \times \to c$ can be written as $\to a \times (\to b - \to c) = \to 0$
Now cross product of two vectors is zero when
1) Either of the two or both vectors are zero
Or
2) They are parallel to each other.
It is given that $\to a \neq 0$
So
either $\to a$ is parallel to $\to b - \to c$
or $\to b - \to c$ = 0 i.e., $\to b = \to c$

So $\to a \times \to b = \to a \times \to c$ will imply following
Either $\to b = \to c$
or $\to a$ is parallel to $\to b - \to c$

Suggest Corrections

Similar questions

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a, b, c

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a (a - b) + b (b - c) + c (c - a) = 0,

only if

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(a) a + b + c = 0

(b) (a + b + c)³ =27abc

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(d) a³ + b³ + c³ = 0

Q. 2. a—b b—c c—a b—c c a a—b=0 c—a a b b—c

Q. If a, b, c are real numbers such that

|\begin{matrix} b + c & c + a & a + b \\ c + a & a + b & b + c \\ a + b & b + c & c + a \end{matrix}| = 0

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Q. If

\vec{a} \cdot \vec{b} = \vec{a} \cdot \vec{c}

and

\vec{a} \times \vec{b} = \vec{a} \times \vec{c,} \vec{a} \neq 0,

then
(a)

\vec{b} = \vec{c}

(b)

\vec{b} = \vec{0}

(c)

\vec{b} + \vec{c} = \vec{0}

(d) none of these

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→a≠0,→a×→b=→a×→c⇒→b=→c

$\to a \neq 0, \to a \times \to b = \to a \times \to c \Rightarrow \to b = \to c$