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Arrange the vectors additions so that their magnitudes are in the increasing ordera) two vector A→ and B→ are parallel b) Two vectorsA→ and B→ are anti parallel c) Two vectorsA→ and B→ making an angle 60°d) Two vectors A and B→ making 120°.

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a

b, d, c, a

b

b, c, d, a

c

a, c, d, b

d

c, d, a, b

answer is A.

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Detailed Solution

R=A2+B2+2ABcosθ If θ=0 then R=A+BIf θ=60 then R=A2+B2+2ABcos60==A2+B2+ABIf θ=120 then R=A2+B2+2ABcos120==A2+B2-ABIf θ=180 then R=A-B

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Arrange the vectors additions so that their magnitudes are in the increasing ordera) two vector A→ and B→ are parallel b) Two vectorsA→ and B→ are anti parallel c) Two vectorsA→ and B→ making an angle 60°d) Two vectors A and B→ making 120°.