Which of the following is the definition of sinh(x)?
A
(e^x + e^(-x))/2
B
(e^x - e^(-x))/2
C
(e^x - 1)/x
D
ln(x + sqrt(x^2 + 1))
Analysis & Theory
sinh(x) = (e^x - e^(-x)) / 2
Which of the following is the definition of cosh(x)?
A
(e^x - e^(-x))/2
B
(e^x + e^(-x))/2
C
1 / sinh(x)
D
ln(x)
Analysis & Theory
cosh(x) = (e^x + e^(-x)) / 2
What is the value of sinh(0)?
A
1
B
0
C
e
D
Undefined
Analysis & Theory
sinh(0) = (e^0 - e^0)/2 = 0
What is the value of cosh(0)?
A
0
B
1
C
e
D
Undefined
Analysis & Theory
cosh(0) = (e^0 + e^0)/2 = 1
Which identity is true for all x?
A
cosh²x - sinh²x = 1
B
cosh²x + sinh²x = 1
C
sinh²x - cosh²x = 1
D
cosh x = sinh x
Analysis & Theory
This is a fundamental identity: cosh²x - sinh²x = 1
What is the derivative of sinh(x)?
A
cosh(x)
B
sinh(x)
C
1 / sinh(x)
D
−cosh(x)
Analysis & Theory
d/dx [sinh(x)] = cosh(x)
What is the derivative of cosh(x)?
A
−sinh(x)
B
cosh(x)
C
sinh(x)
D
1 / cosh(x)
Analysis & Theory
d/dx [cosh(x)] = sinh(x)
Which of the following is an odd function?
A
cosh(x)
B
sinh(x)
C
Both
D
None
Analysis & Theory
sinh(x) is odd: sinh(−x) = −sinh(x)
Which of the following is an even function?
A
sinh(x)
B
cosh(x)
C
Both
D
None
Analysis & Theory
cosh(x) is even: cosh(−x) = cosh(x)
Which of the following is true about the graph of sinh(x)?
A
It passes through the origin
B
It has a minimum at x = 0
C
It is bounded
D
It is symmetric about y-axis
Analysis & Theory
sinh(0) = 0, so it passes through the origin