How do I solve this? $\displaystyle Given\ c\times{d}=2i+3j, determine \ c\cdot{(2i+3j)}$
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Originally Posted by ashes How do I solve this? $\displaystyle Given\ c\times{d}=2i+3j, determine \ c\cdot{(2i+3j)}$ The cross product of two vectors is a vector at right angles to both of the vectors. So The dot product of either of these two vectors with the cross product is zero. So: $\displaystyle c\cdot (2i+3j) =0$ RonL
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