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Grade: 12th pass
        
if the vector 2i+3j+8k is perpendicular to the vector 4i-4j+ak then the value of a is
9 months ago

Answers : (2)

aditya kulkarni
53 Points
							
do the dot product of the two vectors. If it equals 0 then the two vectors are perpendicular.
(2i+3j+8k).(4i-4j+ak)=0
(2*4)+(4*-4)+(8a)=0
8+(-16)+8a=0
8a=8 so a=1
 
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9 months ago
Akash Biswas
28 Points
							(2i+3J+8k). (4j-4i+ak) =0We find the dot product for perpendicular vectors which is equal to zero.On solving we get -8+12+8a=0Giving, a=-1/2
						
6 months ago
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