# Find the equation of straight line at a perpendicular distance of 5 units from the origin such that the perpendicular

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Find the equation of straight line at a perpendicular distance of 5 units from the origin such that the perpendicular drawn from the origin makes an angle of 30° with the +ve direction of x-axis measured anticlockwise.

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Given p = 5, α = 30°

∴ By the normal form of straight line, the equation of required line is x cosα + ysinα = p