The length of the perpendicular from the origin to a line is 7 and line makes an angle of 150° with the positive direction of y-axis, then the equation of the line is
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a
3x+y=7
b
3x-y=14
c
3x+y+14=0
d
3x+y-14=0
answer is D.
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Detailed Solution
Here p=7 and α=30°∴ Equation of the required line is xcos30°+ysin30°=7 or x32+y×12=7 or 3x+y=14