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Problem
Problem
λ
cos
x
−
3
sin
x
=
λ
+
1
\lambda \cos x - 3 \sin x = \lambda + 1
λ
cos
x
−
3
sin
x
=
λ
+
1
is solvable only, if a.
λ
∈
[
0
,
5
]
\lambda \in [0, 5]
λ
∈
[
0
,
5
]
b.
λ
∈
[
4
,
5
]
\lambda \in [4, 5]
λ
∈
[
4
,
5
]
c.
λ
∈
(
−
∞
,
4
]
\lambda \in (-\infty, 4]
λ
∈
(
−
∞
,
4
]
d. None of these
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