Line L has intercepts a and b on the axes of co ordinates. When the axes are rotated through a givenn angle, keeping the origin fixed, the straight line L has intercpets p and q on the transformed axes. Prove that`1/(a^(2))+1/(b^(2))=1/(p^(2))+1/(q^(2))`.

Answer

`(1)/(P^(2))+(1)/(Q^(2))`