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Mathematics
Mathematics
Problem
If
y
=
tan
x
+
sec
x
y = \tan x + \sec x
y
=
tan
x
+
sec
x
, prove that
d
2
y
d
x
2
=
cos
x
(
1
−
sin
x
)
2
\frac{d^2y}{dx^2} = \frac{\cos x}{(1 - \sin x)^2}
d
x
2
d
2
y
=
(
1
−
s
i
n
x
)
2
c
o
s
x
.
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