What is the dot product of $<8,8,1>$ and $<-1, 2,3 >$ ?

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Answer 1 · 2016-11-27T17:41:57

$A*B= 11$

$A < A_x,A_y,A_z >$

$B < B_x,B_y,B_z >$

$A*B= < A_x*B_x+A_y*B_y+A_z*B_z >$

$A < 8,8,1 >$

$B < -1,2,3 >$

$A*B =< (8*(-1)+8*2 +1*3>$

$A*B= <-8+16+3 >$

$A*B=11$

What is the dot product of <8,8,1><8,8,1> and <-1, 2,3 ><-1, 2,3 >?