alleryStart learning →The unit vector in the direction of 3i - 4j is?
A(3i + 4j)/5
B(3i - 4j)/25
C(3i - 4j)/5
D(3i - 4j)/7
Answer & Solution
Correct answer: C. (3i - 4j)/5
Its magnitude is sqrt(9 + 16) = 5, and dividing by 5 gives a vector of length one in the same direction.
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