Question

Find the angle between i^ + j^ and i^ by dot product method​

Answer 1

Answer:

Explanation:

A . B = |A||B|cosθ

cosθ = [A . B] / [|A||B|]

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cosθ = [(i^ + j^) . (i^)] / [|i^+j^||i^|]

cosθ = [1+0+0]/[$\sqrt{2}$]

cosθ = 1/$\sqrt{2}$

θ = $45^{o}$ or (π/4) rad