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Cross Product of Two Vectors. The vector product or cross product of two vectors A and B is denoted by A × B, and its resultant vector is perpendicular to the vectors A and cross product is mostly used to determine the vector, which is perpendicular to the plane surface spanned by two vectors, whereas the dot product is used to find the angle between two .

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Before getting into the multiplication of complex numbers, let’s recall what is a complex number and how to represent it. In mathematics, we can write complex numbers in the form z = x + iy, where x and y are real numbers, and i is a symbol called the imaginary unit, and satisfying the equation i 2 = −1. No “real” number satisfies this equation, and i was called an imaginary .