When the component vectors have equal or opposite directions (sin(Θ) = 0) i.e. the vectors are parallel.
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If zero is counted as a whole number, then the first three whole numbers are zero, one and two and the product of ANY series containing zero is ZERO. If, on the other hand, only non-zero numbers are considered, then the series is one, two and three and the product is six.
No. The product of two negative numbers is positive.
Because in dot product we take projection fashion and that is why we used cos and similar in cross product we used sin
cross product
Any number multiplied by zero gives a product of 0.