# What does it mean if the dot product of two vectors is negative?

## What does it mean if the dot product of two vectors is negative?

If the dot product is negative then the angle is greater than 90 degrees and one vector has a component in the opposite direction of the other. A positive dot product means that two signals have a lot in common—they are related in a way very similar to two vectors pointing in the same direction.

### What does it mean when dot product is negative?

θ is the angle between the vectors, and cos(θ) is negative when π2<θ<3π2. This means the two vectors are facing in “opposite directions” (of course not exactly opposite, hence the quotes). You can think of the dot product as how aligned two vectors are.

#### Can dot product of vectors take negative value?

Answer: The dot product can be any real value, including negative and zero. The dot product is 0 only if the vectors are orthogonal (form a right angle).

Can the vector product of two vectors be negative?

Never. The cross product of two vectors is itself a vector, and vectors do not have a meaningful notion of positive or negative. Ans: When angle between two vectors varies between 180 to 360 degree , then cross product becomes negative because for 180

When is the dot product of two vectors positive?

The dot product of two vectors is always a scalar quantity. It is positive, if angle between the vectors is acute (i.e. < 90º) and it is negative, if angle between them is obtuse (i.e.90 < θ ≤ 180º) 2. It is commutative, i.e.

## Which is the only way a dot product can be zero?

orthogonal vectors is zero. Conversely, the only way the dot product can be zero is if the angle between the two vectors is 90 degrees (or trivially if one or both of the vectors is the zero vector). Thus, two non-zero

### How to find the magnitude of a dot product?

The dot product of two vectors a= and b= is given by An equivalent definition of the dot product is where theta is the angle between the two vectors (see the figure below) and |c| denotes the magnitude of the vector c. This second definition is useful for finding the angle theta between the two vectors. Example

#### What are the properties of the dot product?

Key Concepts 1 The dot product, or scalar product, of two vectors and is 2 The dot product satisfies the following properties: 3 The dot product of two vectors can be expressed, alternatively, as This form of the dot product is useful for finding the measure of the angle formed by two vectors. 4 Vectors u and v are orthogonal if