Question

Equation of a straight line on which length of perpendicular from the origin is four units and the line makes an angle of 120° with the x-axis, is-

• A. + y + 8 = 0
• B. – y = 8
• C. + y = 8
• D. x –$\sqrt { 3 }$y + 8 = 0

Answer 1

Answer: (C)

+ y = 8

Answer 2

Let the equation

x cos a + y sin a = p

x cos 30⁰ + y sin 30⁰ = 4

+ = 4

$\sqrt { 3 }$x + y = 8