Finding the smallest angle between Vectors

In summary, the smallest angle between two vectors is the angle formed by the two vectors when placed tail-to-tail, and it can be calculated using the dot product formula. This angle is always a positive value between 0 and 180 degrees and has significance in various scientific fields. The smallest angle and the absolute value of the smallest angle between two vectors are the same.
  • #1
ppacc
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Vectors Angles

How do you find the smallest angle between vectors? This one is tricky because 1 vector and 3 values and the other has 2.

A (2i+j+3k) and B (-2j+2k)

Thanks,

Pamela
 
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  • #2
It doesn't matter, the dot product is still the same. think of the 2nd vector as (0i-2j+2k) and compute the cosine between the vectors.
 
  • #3
In addition, there is no smallest angle between two vectors ; there can be only one angle (given through the dot product).
"Smallest angle" is a poor term since it almost implies that there exist other angles.
 

FAQ: Finding the smallest angle between Vectors

1. What is the smallest angle between two vectors?

The smallest angle between two vectors is the angle formed by the two vectors when they are placed tail-to-tail. It is the smallest angle between the two lines that represent the vectors.

2. How do you calculate the smallest angle between two vectors?

The smallest angle between two vectors can be calculated using the dot product formula: θ = cos⁻¹((a · b) / (|a| * |b|)), where a and b are the two vectors and |a| and |b| represent their magnitudes.

3. Can the smallest angle between two vectors be negative?

No, the smallest angle between two vectors cannot be negative. It is always a positive value between 0 and 180 degrees.

4. What is the significance of finding the smallest angle between two vectors?

Finding the smallest angle between two vectors is important in many fields of science, including physics, engineering, and mathematics. It allows for the determination of the relative orientation and magnitude of the two vectors, which can be useful in solving various problems and equations.

5. Is there a difference between the smallest angle and the absolute value of the smallest angle between two vectors?

No, the smallest angle and the absolute value of the smallest angle between two vectors are the same. This is because angles are always measured as positive values, regardless of their direction.

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