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mathworld.wolfram.com/ParallelVectors.html

Two vectors u and v are parallel if their cross product is zero, i.e., uxv=0. Algebra. Applied Mathematics. Calculus and Analysis. Discrete Mathematics. Foundations of Mathematics. ... Parallel Vectors. Two vectors and are parallel if their cross product is zero, i.e., . SEE ALSO: Cross Product, Parallel Lines, Perpendicular.

www.onlinemathlearning.com/parallel-vectors.html

Lessons on Vectors: Parallel Vectors, how to prove vectors are parallel and collinear, conditions for two lines to be parallel given their vector equations, Vector equations, vector math, examples and step by step solutions

www.reference.com/math/dot-product-parallel-vectors-189f6c6b2566ea90

The dot product of two parallel vectors is equal to the algebraic multiplication of the magnitudes of both vectors. If the two vectors are in the same direction, then the dot product is positive. If they are in the opposite direction, then the dot product is negative.

www.problemsphysics.com/vectors/parallel_perpend_vectors.html

Question 2 Find the real number a so that the vectors A = (2a , 16) and B = (3a+2 , -2) are perpendicular Solution to Question 2 The condition for two vectors A = (Ax , Ay) and B = (Bx , By) to be perpendicular is: Ax Bx + Ay By=0 Rewrite the above condition using the components of vectors, we obtain the equation

tutorial.math.lamar.edu/Classes/CalcII/DotProduct.aspx

The dot product gives us a very nice method for determining if two vectors are perpendicular and it will give another method for determining when two vectors are parallel. Note as well that often we will use the term orthogonal in place of perpendicular. Now, if two vectors are orthogonal then we know that the angle between them is 90 degrees.

en.wikipedia.org/wiki/Cross_product

The dot product of two unit vectors behaves just oppositely: it is zero when the unit vectors are perpendicular and 1 if the unit vectors are parallel. Unit vectors enable two convenient identities: the dot product of two unit vectors yields the cosine (which may be positive or negative) of the angle between the two unit vectors.

www.varsitytutors.com/.../determine-if-two-vectors-are-parallel-or-perpendicular

Tell whether the following two vectors are perpendicular or parallel and why. Perpendicular, because their dot product is zero. Perpendicular, because their dot product is one. Parallel, because their dot product is zero. Neither perpendicular nor parallel, because their dot product is neither zero ...

tutorial.math.lamar.edu/Classes/CalcII/VectorArithmetic.aspx

Two vectors are parallel if they have the same direction or are in exactly opposite directions. Now, recall again the geometric interpretation of scalar multiplication. When we performed scalar multiplication we generated new vectors that were parallel to the original vectors (and each other for that matter).

en.wikipedia.org/wiki/Vector_projection

The vector projection of a vector a on (or onto) a nonzero vector b (also known as the vector component or vector resolution of a in the direction of b) is the orthogonal projection of a onto a straight line parallel to b.It is a vector parallel to b, defined as = ^ where is a scalar, called the scalar projection of a onto b, and b̂ is the unit vector in the direction of b.

www.softschools.com/formulas/physics/unit_vector_formula/83

Vectors have both a magnitude (value) and a direction. Vectors are labeled with an arrow, for example: . A unit vector is a vector that has a magnitude of 1. They are labeled with a "", for example:. Any vector can become a unit vector by dividing it by the vector's magnitude. Vectors are often written in xyz coordinates. This can be done in ...

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