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Mathematics
Mathematics
Problem
If the function
f
(
x
)
=
tan
(
tan
x
)
−
sin
(
sin
x
)
tan
x
−
sin
x
f(x) = \frac{\tan(\tan x) - \sin(\sin x)}{\tan x - \sin x}
f
(
x
)
=
t
a
n
x
−
s
i
n
x
t
a
n
(
t
a
n
x
)
−
s
i
n
(
s
i
n
x
)
is continuous at
x
=
0
x = 0
x
=
0
, then
f
(
0
)
f(0)
f
(
0
)
is equal to \_\_\_\_\_\_.
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