Q.
A→ and B→ are two vectors and θ is the angle between then, if |A→×B→|=3(A→.B→) , the value of θ is
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a
450
b
300
c
900
d
600
answer is D.
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Detailed Solution
Given ; |A→×B→|=3(A→.B→) or ABsinθ=3ABcosθ or tanθ=3=tan600,θ=600
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