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Mathematics
Mathematics
Problem
If
x
=
a
(
cos
t
+
log
tan
t
2
)
,
y
=
a
sin
t
x = a \left(\cos t + \log \tan \frac{t}{2}\right), y = a \sin t
x
=
a
(
cos
t
+
lo
g
tan
2
t
)
,
y
=
a
sin
t
, then
d
y
d
x
=
\frac{dy}{dx} =
d
x
d
y
=
(a)
tan
t
\tan t
tan
t
(b)
−
tan
t
-\tan t
−
tan
t
(c)
cot
t
\cot t
cot
t
(d)
−
cot
t
-\cot t
−
cot
t
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