19.3 Trigonometry
Octave provides the following trigonometric functions. Angles are
specified in radians. To convert from degrees to radians multipy by
pi/180
(e.g. sin (30 * pi/180) returns the sine of 30 degrees).
— Mapping Function:
sin (
x)
Compute the sine of each element of x.
— Mapping Function:
cos (
x)
Compute the cosine of each element of x.
— Mapping Function:
tan (
z)
Compute tangent of each element of x.
— Mapping Function:
sec (
x)
Compute the secant of each element of x.
— Mapping Function:
csc (
x)
Compute the cosecant of each element of x.
— Mapping Function:
cot (
x)
Compute the cotangent of each element of x.
— Mapping Function:
asin (
x)
Compute the inverse sine of each element of x.
— Mapping Function:
acos (
x)
Compute the inverse cosine of each element of x.
— Mapping Function:
atan (
x)
Compute the inverse tangent of each element of x.
— Mapping Function:
asec (
x)
Compute the inverse secant of each element of x.
— Mapping Function:
acsc (
x)
Compute the inverse cosecant of each element of x.
— Mapping Function:
acot (
x)
Compute the inverse cotangent of each element of x.
— Mapping Function:
sinh (
x)
Compute the hyperbolic sine of each element of x.
— Mapping Function:
cosh (
x)
Compute the hyperbolic cosine of each element of x.
— Mapping Function:
tanh (
x)
Compute hyperbolic tangent of each element of x.
— Mapping Function:
sech (
x)
Compute the hyperbolic secant of each element of x.
— Mapping Function:
csch (
x)
Compute the hyperbolic cosecant of each element of x.
— Mapping Function:
coth (
x)
Compute the hyperbolic cotangent of each element of x.
— Mapping Function:
asinh (
x)
Compute the inverse hyperbolic sine of each element of x.
— Mapping Function:
acosh (
x)
Compute the inverse hyperbolic cosine of each element of x.
— Mapping Function:
atanh (
x)
Compute the inverse hyperbolic tangent of each element of x.
— Mapping Function:
asech (
x)
Compute the inverse hyperbolic secant of each element of x.
— Mapping Function:
acsch (
x)
Compute the inverse hyperbolic cosecant of each element of x.
— Mapping Function:
acoth (
x)
Compute the inverse hyperbolic cotangent of each element of x.
Each of these functions expect a single argument. For matrix arguments,
they work on an element by element basis. For example,
sin ([1, 2; 3, 4])
=> 0.84147 0.90930
0.14112 -0.75680
— Mapping Function:
atan2 (
y, x)
Compute atan (y / x) for corresponding elements of y
and x. The result is in range -pi to pi.