Question

xcostheta+ycosphai+zcosshai=0, xsintheta+ysinphai+zsinshai=0,xsectheta+ysecphai+zsecshai=0 then prove that x^2+y^2-z^2 =4x^2y^2

Answer 1

Answer:

If xcostheta+ycosphi+ zcosshi=0;xsintheta+ysinphi+zsinshi=0; xsectheta+ysecphi+zsecshi=0;then prove that (x^2+y^2-z^2)^2=4x^2y^2.