**Question :** If A⃗ =2î+ 3ĵ+ 4k̂ and B⃗ = 4î+ 3ĵ+ 2k̂, then angle between A⃗ and B⃗ is

(A) \sin ^{-1} (25/29)

(B) \sin ^{-1} (29/25)

(C) \cos ^{-1} (25/29)

(D) \cos ^{-1} (29/25)

**Answer :** option (C)

**Solution :**

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**Question :** If A⃗ =2î+ 3ĵ+ 4k̂ and B⃗ = 4î+ 3ĵ+ 2k̂, then angle between A⃗ and B⃗ is

(A) \sin ^{-1} (25/29)

(B) \sin ^{-1} (29/25)

(C) \cos ^{-1} (25/29)

(D) \cos ^{-1} (29/25)

**Answer :** option (C)

**Solution :**