✓ Board-verified
Mathematics · 2024 · 1 mark
CBSE 2024 · Region 5 · Set 1 · Q20
Assertion (A): The vectors a =6 i +2 j -8 k; b =10 i -2 j -6 k; c =4 i -4 j +2 k represent the sides of a right angled triangle. Reason (R): Three…
Assertion (A) : The vectors \[\begin{aligned} & \vec{a}=6 \hat{i}+2 \hat{j}-8 \hat{k} \\ & \vec{b}=10 \hat{i}-2 \hat{j}-6 \hat{k} \\ & \vec{c}=4 \hat{i}-4 \hat{j}+2 \hat{k} \end{aligned} \] represent the sides of a right angled triangle.
Reason (R) : Three non-zero vectors of which none of two are collinear forms a triangle if their resultant is zero vector or sum of any two vectors is equal to the third.
Official answer
(B)
Both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of the Assertion (A).
All Vector Algebra questions2024 question paperNCERT solutions: Vector AlgebraPractice Vector Algebra →
More from Vector Algebra
- If a and b are two non-collinear vectors, then find x, such that α=(x-2) a+ b and β=(3+2 x) a-2 b are collinear.2025
- Three friends A, B and C move out from the same location O at the same time in three different directions to reach their destinations. They move out…2025
- If a+ b+ c= 0 such that | a|=3,| b|=5,| c|=7, then find the angle between a and b. OR If a and b are unit vectors inclined with each other at an…2025
- Find a vector of magnitude 4 units perpendicular to each of the vectors 2 i- j+ k and i+ j- k and hence verify your answer.2024
- The position vectors of points P and Q are p and q respectively. The point R divides line segment PQ in the ratio 3: 1 and S is the mid-point of line…2024
- If | a × b|=√3 and a · b=-3, then angle between a and b is2023
- Let p and q be two unit vectors and α be the angle between them. Then ( p+ q) will be a unit vector for what value of α?2025
- Using vectors, find the value of 'b' if the points A(-1, -1, 2), B(2, b, 5) and C(3, 11, 6) are collinear. Also, determine the ratio in which the…2022
CBSE Class 12 Mathematics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.