An electric dipole is placed at the origin O such that its equator is y-axis.At a point P far away from dipole the electric field direction is along y-direction. OP makes an angle a with the x axis such that

-tan a=root 3

-tan a=root 2

-tan a=1

-tan a=1/root2

Here, electric field makes an angle a+α with the direction of dipole,Where,tan α=12tanaa+α=900 or α=900-aTherefore,tan (900-a)=12tan aor cot a=12tanaor tan2a=2or tan a=2

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