Question

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​

Answer 1

Answer:

if xcostheta+ycosphi+zcosshi=0; xsintheta+ysinphi+zsinshi=0;xsectheta+ ysecphi+zsecshi=0;then(x^2+y^2+.