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In polar representation of a complex number (r, 2π) lies on ____________(a) x-axis(b) y-axis(c) z-axis(d) any axisThe question was posed to me during an interview.Enquiry is from Argand Plane and Polar Representation in section Complex Numbers and Quadratic Equations of Mathematics – Class 11

Answer»

Right option is (a) x-AXIS

Easiest EXPLANATION: To convert polar representation (R, θ) into argand plane (x, y), substitute x = r cos θ and y = r sin θ.

x = r cos 2π = r and y = r sin 2π = 0.

Argand plane representation is (r, 0). SINCE imaginary part is zero, so it LIES on real axis i.e. x-axis.



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