Trigonometric EquationHard

Question

Locus of |z - cosθ  -  icosθ|+|z  -  sinθ  +  isinθ|  =  √2(where  θ  is  constant, i =√-1  and z  ∈  C) is 

Options

A.ellipse
B.circle
C.hyperbola
D.line segment

Solution

         
|z - cosθ - icosθ| + |z - sinθ + isinθ| = √2
distance  AB  =    =  √2
PA + PB = AB ⇒ P lies on segment AB.

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