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JEEMAIN and NEET
>>
Mathematics
>>
Class11
>>
Coordinate Geometry
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Q)
The line
x
cos
α
+
y
sin
α
=
p
is a tangent to the ellipse.
x
2
a
2
+
y
2
b
2
=
1
if
(
A
)
a
2
cos
2
α
−
b
2
sin
2
α
=
p
2
(
B
)
a
2
sin
2
α
−
b
2
cos
2
α
=
p
2
(
C
)
a
2
cos
2
α
+
b
2
sin
2
α
=
p
2
(
D
)
a
2
cos
2
α
+
b
2
sin
2
α
=
p
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