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Mathematics
Mathematics
Problem
If
y
=
sec
x
+
tan
x
−
1
−
sec
x
+
tan
x
+
1
y = \frac{\sec x + \tan x - 1}{-\sec x + \tan x + 1}
y
=
−
s
e
c
x
+
t
a
n
x
+
1
s
e
c
x
+
t
a
n
x
−
1
, then find
d
y
d
x
\frac{dy}{dx}
d
x
d
y
at
x
=
π
4
x = \frac{\pi}{4}
x
=
4
π
.
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