When two vectors 1 and B are drawn from a common point, the angle between them is (a) Using vector techniques Show that the magnitude of their vector sum is given by A2 B2 2ABcos (b) If A (vector) and B (vector) have the same magnitude, for which value of will their vector sum have the same magnitude as A (vector) or B (vector)

Question: When two vectors 1 and B are drawn from a common point, the angle between them is . (a) Using vector techniques. Show that the

When two vectors 1 and B are drawn from a common point, the angle between them is Φ.

(a) Using vector techniques. Show that the magnitude of their vector sum is given by √ A2 + B2 + 2ABcosΦ

(b) If A_(vector) and B_(vector) have the same magnitude, for which value of ϕ will their vector sum have the same magnitude as A_(vector) or B_(vector)?

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