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ICSE
MATHEMATICS · Single correct · ICSE · Mathematics · Algebra · Algebra
Problem
f
(
x
)
=
log
sgn
(
sin
x
)
+
sgn
(
∣
sin
x
∣
)
(
4
sin
x
−
cos
2
x
)
f(x)=\log_{\operatorname{sgn}(\sin x)+\operatorname{sgn}(|\sin x|)}\left(4\sin x-\cos^2x\right)
f
(
x
)
=
lo
g
sgn
(
s
i
n
x
)
+
sgn
(
∣
s
i
n
x
∣
)
(
4
sin
x
−
cos
2
x
)
is (1)
(
−
∞
,
0
]
(-\infty,0]
(
−
∞
,
0
]
(2)
(
−
∞
,
1
]
(-\infty,1]
(
−
∞
,
1
]
(3)
(
−
∞
,
2
]
(-\infty,2]
(
−
∞
,
2
]
(4)
(
−
∞
,
1
)
(-\infty,1)
(
−
∞
,
1
)
Related theory
Sign of Trigonometric Functions
Trigonometric Properties
Trigonometric Functions
Logarithmic Functions
Exponential and Logarithmic Functions
Functions
Logarithms
Algebra
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