Question: Angle of intersection of two polar curves is equal to the angle between the tangents drawn at the point of intersection of the two curves then What is the condition for the two curves intersecting orthogonally for the below mentioned figure?

Options

A : tan ?1? . tan??3=1

B : tan??1 . tan??3=-1

C : tan?(?1+?3)=frac{1}{sqrt{2}}

D : tan?(?1-?3)=frac{1}{sqrt{2}}

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