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Q.

The line joining the points A(2,0) and B(3,1) is rotated through an angle of 450, about A in the anticlock wise direction. The coordinates of B in the new position

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a

(2,2)

b

(2,2)

c

(2,2)

d

(2,2)

answer is A.

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Detailed Solution

AB=1+1=2slope of AB is m=1-03-2=1 tanθ=1⇒θ=450 then rotation ofm line is 900 ∴ by distance, verification  the new coordinates of B are (2,2)
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