1.

The locus of the point (2sec alpha cos beta, 2 sec alpha sin beta, 2tanalpha) is

Answer»

`X^(2)+y^(2)-Z^(2)=R^(2)`
`x^(2)+y^(2)+z^(2)=r^(2)`
`x^(2)+y^(2)-z^(2)=2r^(2)`
`x^(2)-y^(2)+z^(2)=r^(2)`

ANSWER :a


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