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Maxima and minima
Question
If
f
(
x
)
=
sin
−
1
x
2
+
cos
−
1
x
2
is stationary at
x
=
a
. Then
a
2
=
Easy
Solution
f
1
(
x
)
=
0
⇒
sin
−
1
x
⇒
cos
−
1
x
⇒
x
=
1
2
=
a
⇒
a
2
=
1
2
=
0.5
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