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Question

One of the equation of the lines which passes through the point (-2, 3) and equally inclined to the co-ordinate axes is .


A
y=x+5
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B
y=x+4
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C
y=x1
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Solution

The correct option is A y=x+5

From the above diagram it is clear that; there are two lines PQ and RS, equally inclined to the co-ordinate axes.

For line PQ: m = tan 45° = 1

and (x1,y1)=(2,3)

Therefore, its equation: (yy1)=m(xx1)
y3=1(x+2)

y3=x+2

⟹ y = x + 5

For line RS: m = tan (-45°) = -1

and(x1,y1)=(2,3)

Therefore, its equation: (yy1)=m(xx1)

y3=1(x+2)

y3=x2

y=x+1

Therefore, the required equations are y=x+5 and y=x+1


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