Simplify and write the trigonometric expression in terms of sine and cosine:
tan
u
+
cot
u
=
1
f
(
u
)
\displaystyle {\tan{{u}}}+{\cot{{u}}}={\frac{{{1}}}{{{f{{\left({u}\right)}}}}}}
tan
u
+
cot
u
=
f
(
u
)
1
f
(
u
)
=
\displaystyle {f{{\left({u}\right)}}}=
f
(
u
)
=
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