1.

If the chords of contact of the tangents from two pointsto the hyperbola4x^(2)-5y^(2)=a^(2) are at right angles then 16x_(1)x_(2)+25y_(1)y_(2) is equal to

Answer»

`-1`
0
`a^(2)`
1

Answer :B


Discussion

No Comment Found

Related InterviewSolutions