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1 Oct 2011 18:31:08 IST

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indication of negative sign in dot product

Mathematics

while solving dot product sometimes the magnitude is negative what does that mean as in cross product it indicates the direction

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Anjali Goyal

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1 Oct 2011 18:41:06 IST

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The dot-product of two vectors tells about the angle between them. If the dot-product is positive, then the angle between the two vectors is between 0 and 90 degrees. When the dot-product is negative, the angle is more than 90 degrees. Therefore, the dot-product can be any value (positive, negative, or zero).For example, the dot product of the vectors (1,1,1) and (-1,0,0) is -1*1+1*0+1*0 = -1 which is negative.

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