VectorHard

Question

If are vectors such that = 0 and || = 7, || = 5, || = 3 then angle between vector and is

Options

A.60o 
B.30o 
C.45o 
D.90o 

Solution


⇒   2|||| cos θ = 49 - 34 = 15 ⇒ 2 × 5 × 3cos θ = 15 ⇒ cos θ = 1/2 ⇒ θ = = 600

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