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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Mathematics » A Brief Note on Co-Initial Vectors

A Brief Note on Co-Initial Vectors

When two or more vectors have the same starting point, a vector is said to be a co-initial vector.

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As stated in algebra, coinitial vectors are any two or more vectors whose initial points are the same, that is, they all begin at the same place. Parallel vectors may or may not exist between co starting vectors. Depending on the direction of the vectors, they can be intersecting vectors or parallel vectors, and vice versa. With this in mind, we can say that any two or more given vectors are considered to be co initial vectors if they have the same initial points as one another. 

We will go over the concept of coinitial vectors, the definition of co initial vectors, and the difference between coinitial vectors and collinear vectors in more detail later in this tutorial. In order to have a better understanding of the concept, we will also solve a few instances based on it.

 Coinitial Vectors

When two or more vectors have the same initial point, they are referred to as co initial vectors (or co initial vectors). Such vectors all begin at the same location. Although it is not required that the coinitial vectors have the same terminal point, it is required that they have the same initial point. Coinitial vectors can be either parallel or intersecting vectors in their orientation. Two vectors, A B and A C, are co initial vectors since they both begin at the same point, A, in the same direction. Despite the fact that both vectors A B and A C have the same starting point, their terminal positions are different. In the following part, we’ll go over how to define the starting vectors.

Co Initial Vectors are a type of vector that is defined as follows:

A co initial vector is a set of two or more vectors in vector theory that have the same initial point as each other. The simplest way to express this is to state that all coinitial vectors start from the same position as one another. The graphic below depicts five vectors, which are denoted by the letters OA, OB, OC, OD, and OE. The one thing that all of these five vectors have in common is that they all begin at the same location, which is the letter O. As a result, the vectors OA, OB, OC, OD, and OE are all coinitial vectors that begin at the initial point.

 

 

Co-initial vectors and collinear vectors are two types of vectors.

Coinitial vectors and collinear vectors are defined in this section, and their significance will be discussed. Coinitial vectors are defined as two or more vectors that all begin at the same location in the coordinate system. On the other hand, two or more vectors are said to be collinear vectors if they are parallel to the same line that they are parallel to. To better grasp the differences between co initial vectors and collinear vectors, consider the following:

 

Co initial vectors

Collinear vectors

When two or more vectors have the same initial point, they are referred to as coinitial vectors, and vice versa.

Collinear vectors are defined as two or more vectors that are parallel to the same given line and are parallel to each other.

Initial vectors might be parallel or intersecting depending on how they are constructed.

When two collinear vectors are compared, the ratio of their coordinates remains constant.

The vectors OA and OB are coinitial vectors because they both begin at the same point, which is O.

If the vectors p and q are collinear, the equation p = nq can be written as p = nq, where n is an integer.

Important Points to Keep in Mind About Coinitial Vectors

 

•Coinitial vectors are defined as vectors that have the same starting point as one another

•Collinear vectors are defined as two or more vectors that are parallel to the same given line and are parallel to each other

•Co initial vectors can be either intersecting vectors or parallel vectors, depending on the direction in which the vectors are pointing at each other 

Conclusion

When two or more vectors have the same initial point, they are referred to as co initial vectors (or co initial vectors). Such vectors all begin at the same location. Although it is not required that the coinitial vectors have the same terminal point, it is required that they have the same initial point. The letters OA, OB, OC, OD, and OE. The one thing that all of these five vectors have in common is that they all begin at the same location, which is the letter O. As a result, the vectors OA, OB, OC, OD, and OE are all coinitial vectors that begin at the initial point. Coinitial vectors are defined as vectors that have the same starting point as one another. Collinear vectors are defined as two or more vectors that are parallel to the same given line and are parallel to each other.

 
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Frequently asked questions

Get answers to the most common queries related to the IIT JEE Examination Preparation.

What exactly are Coinitial Vectors in the context of Vector Theory?

Ans : As stated in algebra, coinitial vectors are any two or ...Read full

What is the best way to identify initial vectors?

Ans : It is referred to as co beginning vectors when two or m...Read full

In what ways are co initial vectors and collinear vectors different from one another?

Ans :It is referred to as co initial vectors when two vectors...Read full

When it comes to vectors, what is the difference between co-initial and co-planar?

Ans : A co initial vector is a set of two or more vectors in vector theory that have the sam...Read full

What are Coterminous Vectors?

Ans: Coterminous vectors are defined as two or more vectors that have the same terminal point, that is, have the sam...Read full

Ans : As stated in algebra, coinitial vectors are any two or more vectors whose initial points are the same, that is, they all begin at the same place. These vectors might be either parallel or intersecting vectors in their arrangement.

Ans : It is referred to as co beginning vectors when two or more vectors share the same starting point, which means that they all begin at the same location in the same direction. In other words, if the coinitial vectors have the same initial point, we can argue that we can identify them.

Ans :It is referred to as co initial vectors when two vectors begin at the same place in time. Collinear vectors, on the other hand, are vectors that are parallel to the same given line and are therefore parallel to each other. It is possible to express collinear vectors in terms of the formulae p = Nq, where N is a scalar value and the variables p and q are collinear vectors.

Ans : A co initial vector is a set of two or more vectors in vector theory that have the same initial point as each other. Vectors that are coplanar in a three-dimensional space, on the other hand, are defined as vectors that lie on the same plane of the space.

Ans: Coterminous vectors are defined as two or more vectors that have the same terminal point, that is, have the same endpoint or final point, and so have the same terminal point.

 

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