Answer my question......
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Resultant Vector R is the Sum of vectors A and B
R = A + B
= ( 2i + 3j + 4k ) - ( 3i - 5j + k )
= 2i + 3j + 4k - 3i + 5j - k
= 2i - 3i + 3j - 3j + 4k - k
= -i + 0 j + 3k = - i + 3k
we know that
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Full Vector = Unit Vector × Magnitude of Full Vector
=> Unit Vector = Full Vector / Magnitude of Full Vector
Now
magnitude of R =√ ( ( - 1 )² + 3² ) = √ ( 1 + 9 ) = √ ( 10 )
Thus Unit vector along the direction of R
= Vector R / Magnitude of R
=( - i + 3k ) / √( 10 )
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