JEE Mains Model Paper 12

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Question : 18 of 90

Marks: +1, -0

Which of the following expressions (t being the parameter) can’t represent a hyperbola?

tx
a
+
y
b
+ t = 0 ,
x
a
+
ty
b
- 1 = 0
x =
a
2
(t+
1
t
) , y =
b
2
(t−
1
t
)
x = et + e−1 , y = et - e−1
x2 = 2 (cost + 3) , y2 = 2 (2cos2 t / 2 - 1)

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