JEE MATHEMATICS MCQ: SCALAR TRIPLE PRODUCT

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Analyzing +4 | -1

Let

O

be the origin and the position vector of the point

P

-\hat{i}-2 \hat{j}+3 k

. If the position vectors of the points

A, B

and

C

are

-2 \hat{i}+\hat{j}-3 k, 2 \hat{i}+4 \hat{j}-2 k

and

-4 \hat{i}+2 \hat{j}-k

respectively, then the projection of the vector

\overrightarrow{O P}

on a vector perpendicular to the vectors

\overrightarrow{A B}

and

\overrightarrow{A C}

View answer and explanation

Correct option: A

Option A (3) is correct because the projection of OP on a vector perpendicular to AB and AC is calculated using the scalar triple product.

More Questions from SCALAR TRIPLE PRODUCT

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\vec r\cdot\vec a = \vec r\cdot\vec b = \vec r\cdot\vec c = 0

\vec r,

\left[ {\vec a\vec b\vec c} \right],

\frac{{x - 3}}{2} = \frac{{y - 2}}{3} = \frac{{z - 1}}{{ - 1}}

\frac{{x + 3}}{2} = \frac{{y - 6}}{1} = \frac{{z - 5}}{3},

\mathbf{\vec a} = \widehat \mathbf{i} - \mathbf{\hat k},\;\mathbf{\vec b} = x\widehat \mathbf{i} + \widehat \mathbf{j} + \left( {1 - x} \right)\mathbf{\hat k}

\mathbf{\vec c} = y\widehat \mathbf{i} + x\widehat \mathbf{j} + \left( {1 + x - y} \right)\mathbf{\hat k}.

\left[ {\mathbf{\vec a},\;\mathbf{\vec b},\;\mathbf{\vec c}} \right]

\vec{a}, \vec{b}

((\vec{a} \times \vec{b}) \times \vec{a}) \cdot((\vec{b} \times \vec{a}) \times \vec{b})

a \cdot(a \times b)=

\mathbf{r}=\mathbf{b}+\lambda \mathbf{c}