Mathematics for IGCSE & O level - Vectors (Section 5 - No. 47)
If vector a = [4, 3], then what is the unit vector of a?
[1, 1]
[4/5, 3/5]
[3/5, 4/5]
[0, 0]
คำอธิบาย
First find the magnitude √(4^2 + 3^2) = 5. Then divide each component by the magnitude.