15(-3i - 4j)
15(-3i + 4j)
15(3i - 4j)
15(3i + 4j)
Correct answer is C
Resultant
(- 2i - 3j) + (5i - j)
= 3i - 4j
Unit vector
= 3i−4j|3i−4j|=3i−4j√3i+(−4)
= 3i−4j√25
= 3i−4j5
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