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Mathematics
Mathematics
Problem
The value of
f
(
x
)
=
x
4
+
4
x
3
+
2
x
2
−
4
x
+
7
f(x) = x^4 + 4x^3 + 2x^2 - 4x + 7
f
(
x
)
=
x
4
+
4
x
3
+
2
x
2
−
4
x
+
7
, when
x
=
cot
11
π
8
x = \cot \frac{11\pi}{8}
x
=
cot
8
11
π
is .....
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