Question

if vector A = 2 i cap +3j cap - z k cap and vector B = i cap + j cap + 4 k cap. find the value of z so that vector A and vector B are perpendicular.​

Answer 1

Explanation:

condition of perpendicular

a.b=0

then vector a= 2i cp +3i cp -zk cp

vector b= i cp +j cp+4 k cp

( 2i + 3j - zk) . (i +j + 4k) =0

2+3-4z =0

5-4z =0

0=0