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Question

A ray of light along x+3y=3 gets reflected upon reaching x -axis, the equation of the reflected ray

A
y=x+3
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B
3y=x3
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C
y=3x3
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D
3y=x1
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Solution

The correct option is B 3y=x3
We have,
x+3y=3
y=13x+1

On comparing y=mx+c, we get
m=tan(x)=13
tanx=13

Point (3,0),m=13

Therefore,
y=mx+c
0=13×3+c
c=1

Therefore,
y=13x1
3y=x3


Hence, this is the answer.

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