If \( \vec{a} \) and \( \vec{b} \) are two unit vectors and \( \the...

Channel:
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=-UsFoXWk11k



Duration: 2:11
0 views
0


If \( \vec{a} \) and \( \vec{b} \) are two unit vectors and \( \theta \) is the angle between them, then the unit vector along the angular bisector of \( \vec{a} \) and \( \vec{b} \) will be given by
\( \mathrm{P} \)
(1) \( \frac{\vec{a}-\vec{b}}{2 \cos (\theta / 2)} \)
(2) \( \frac{\vec{a}+\vec{b}}{2 \cos (\theta / 2)} \)
(3) \( \frac{\vec{a}-\vec{b}}{\cos (\theta / 2)} \)
(4) none of these
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live




Other Videos By PW Solutions


2023-03-21If the vectors \( \hat{i}-\hat{j}, \hat{j}+\hat{k} \) and \( \vec{a...
2023-03-21If points \( \hat{i}+\hat{j}, \hat{i}-\hat{j} \) and \( p \hat{i}+q...
2023-03-21If \( \hat{i}-3 \hat{j}+5 \hat{k} \) bisects the angle between \( \...
2023-03-21Let \( x^{2}+3 y^{2}=3 \) be the equation of an ellipse in the \( x...
2023-03-21Find the value of \( \lambda \) so that the points \( P, Q, R \) an...
2023-03-21\( \vec{A} \) is a vector with direction \( \operatorname{cosines~}...
2023-03-21Locus of the point \( P \), for which \( \overrightarrow{O P} \) re...
2023-03-21If \( \vec{\alpha}+\vec{\beta}+\vec{\gamma}=a \vec{\delta} \) and \...
2023-03-21In a trapezium, vector \( \overrightarrow{B C}=\alpha \overrightarr...
2023-03-21Vectors \( \vec{a}=\hat{i}+2 \hat{j}+3 \hat{k}, \vec{b}=2 \hat{i}-\...
2023-03-21If \( \vec{a} \) and \( \vec{b} \) are two unit vectors and \( \the...
2023-03-21\( A, B, C \) and \( D \) have position vectors \( \vec{a}, \vec{b}...
2023-03-21\( A B C D \) a parallelogram, and \( A_{1} \) and \( B_{1} \) are ...
2023-03-21A point \( O \) is the centre of a circle circumscribed about a tri...
2023-03-21The points \( A(5,-1,1), B(7,-4,7), C(1,-6,10) \) and \( D(-1,-3,4)...
2023-03-21Let \( a, b \) and \( c \) be three units vectors such that \( 3 a+...
2023-03-21The points \( A(5,-1,1), B(7,-4,7), C(1,-6,10) \) and \( D(-1,-3,4)...
2023-03-21Four non-zero vectors will always be (1) linearly dependent (2) lin...
2023-03-21If the centroid of triangle whose vertices are \( (a, 1,3),(-2, b,-...
2023-03-21If the sum of the squares of the distance of a point from the three...
2023-03-21Number of spheres touching all the coordinate planes and having fix...



Tags:
pw