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Problem
Problem
The function
sin
(
x
+
a
)
sin
(
x
+
b
)
\frac{\sin(x+a)}{\sin(x+b)}
s
i
n
(
x
+
b
)
s
i
n
(
x
+
a
)
has no maxima or minima, if a.
b
−
a
=
n
π
,
n
∈
I
b-a = n\pi, n \in I
b
−
a
=
nπ
,
n
∈
I
b.
b
−
a
=
(
2
n
+
1
)
π
,
n
∈
I
b-a = (2n+1)\pi, n \in I
b
−
a
=
(
2
n
+
1
)
π
,
n
∈
I
c.
b
−
a
=
2
n
π
,
n
∈
I
b-a = 2n\pi, n \in I
b
−
a
=
2
nπ
,
n
∈
I
d. None of these
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