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Mathematics
Mathematics
Problem
If
y
=
sec
x
−
tan
x
sec
x
+
tan
x
y = \frac{\sec x - \tan x}{\sec x + \tan x}
y
=
s
e
c
x
+
t
a
n
x
s
e
c
x
−
t
a
n
x
then
d
y
d
x
\frac{dy}{dx}
d
x
d
y
equals :
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