三角变形公式COMSOL中的函数表达

Mathematical Functions

TABLE 3-4: MATHEMATICAL FUNCTIONS
FUNCTION DESCRIPTION SYNTAX EXAMPLE
abs
Absolute value
abs(x)
acos
Inverse cosine (in radians)
acos(x)
acosh
Inverse hyperbolic cosine (in
radians)
acosh(x)
acot
Inverse cotangent (in radians)
acot(x)
acoth
Inverse hyperbolic cotangent (in
radians)
acoth(x)
acsc
Inverse cosecant (in radians)
acsc(x)
acsch
Inverse hyperbolic cosecant (in
radians)
acsch(x)
arg
Phase angle (in radians)
arg(x)
asec
Inverse secant (in radians)
asec(x)
asech
Inverse hyperbolic secant (in
radians)
asech(x)
asin
Inverse sine (in radians)
asin(x)

asinh
Inverse hyperbolic sine (in radians)
asinh(x)
atan
Inverse tangent (in radians)
atan(x)
atan2
Four-quadrant inverse tangent (in
radians)
atan2(y,x)
atanh
Inverse hyperbolic tangent (in
radians)
atanh(x)
besselj
Bessel function of the first kind
besselj(a,x)
bessely
Bessel function of the second kind
bessely(a,x)
besseli
Modified Bessel function of the first
besseli(a,x)
kind
besselk
Modified Bessel function of the
second kind
besselk(a,x)
ceil
Round up to nearest integer
ceil(x)
conj
Complex conjugate
conj(x)
cos
Cosine
cos(x)
cosh
Hyperbolic cosine
cosh(x)
cot
Cotangent
cot(x)
coth
Hyperbolic cotangent
coth(x)

csc
Cosecant
csc(x)
csch
Hyperbolic cosecant
csch(x)
eps
Floating point relative accuracy
eps
erf
Error function
erf(x)
exp
Exponential
exp(x)
floor
Round down to nearest integer
floor(x)
gamma
Gamma function
gamma(x)
i
,
j
Imaginary unit
i
imag
Imaginary part
imag(u)
inf
Infinity
inf
log
Natural logarithm
log(x)
log10
Common logarithm (base 10)
log10(x)
log2
Base-2 logarithm
log2(x)
max
Maximum of two arguments
max(a,b)
min
Minimum of two arguments
min(a,b)

mod
Modulo operator
mod(a,b)
NaN
,
nan
Not-a-number
nan
pi
Pi
pi
psi
Psi function and its derivatives
psi(x,k)
range
Create a range of numbers
range(a,step,b)
real
Real part
real(u)
round
Round to closest integer
round(x)
sec
Secant
sec(x)
sech
Hyperbolic secant
sech(x)
sign
Signum function
sign(u)
sin
Sine
sin(x)
sinh
Hyperbolic sine
sinh(x)
sqrt
Square root
sqrt(x)
tan
Tangent
tan(x)
tanh
Hyperbolic tangent
tanh(x)