if A = 6i- 6j+5k and B=i+2i -k, then find a unit vector parallel to the resultant of A & B
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a unit vector parallel to resultant of Āand B,that means a unit vector in direction of resultant.
Explanation:
R=A+B
A=6i-6j+5k ,B=i+2j-k
=>R = 6i+i -6j+2j+5k-k
=>R= 7i+4j+4k
Ř=R/|R|
=>Ř=7i+4j+4k/√(7²+4²+4²)
=>Ř=7i+4j+4k/9 =>Ř=7/9 i + 4/9 j + 4/9 k
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