If the coordinates of a point be given by the equations \[x=b\sec \varphi ,\ \ y=a\tan \varphi \], then its locus is

If the coordinates of a point be given by the equations \[x=b\sec \var

1.	If the coordinates of a point be given by the equations \[x=b\sec \varphi ,\ \ y=a\tan \varphi \], then its locus is
A.	A straight line
B.	A circle
C.	An ellipse
D.	A hyperbola
Answer» E.

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If the coordinates of a point be given by the equations \[x=b\sec \varphi ,\ \ y=a\tan \varphi \], then its locus is

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