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Mathematics - Straight Lines Question with Solution | TestHub

MathematicsStraight LinesAngle between LinesMedium2 minPYQ_2015
MathematicsMediumsingle choice

A straight lineLthrough the point(3, -2)is inclined at an angle of60°to the line3x+y=1.IfLalso intersects theX-axis, then the equation ofLis:

Options:

Answer:
D
Solution:

Let m be the slope of the line,

then tan60o=m+31-m3

3=m+31-3 m

±3=m+31-3 m

3-3m=m+3 or -3+3m=m+3

4m=0 or 2m=23

m=0 or m=3

Since L intersects X-axis we take m=3

and get y=3x+c

Since it passes through 3,-2, therefore line will become  y-3x+2+33=0

Stream:JEESubject:MathematicsTopic:Straight LinesSubtopic:Angle between Lines
2mℹ️ Source: PYQ_2015

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