Trig and Hyperbolic functions
The following list contains the functions that you can use to calculate trigonometric and hyperbolic values.
For information about using string and numeric fields in functions, and nesting functions, see Evaluation functions.
acos(X)
Description
This function computes the arc cosine of X, in the interval [0,pi] radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic examples
This example returns 1.5707963267948966.
... | eval n=acos(0)
The following example calculates 180 divided by pi and multiplies the result by the arc cosine of 0. This example returns 90.0000000003.
... | eval degrees=acos(0)*180/pi()acosh(X)
Description
This function computes the arc hyperbolic cosine of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 1.3169578969248166.
... | eval n=acosh(2)asin(X)
Description
This function computes the arc sine of X, in the interval [-pi/2,+pi/2] radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 1.5707963267948966.
... | eval n=asin(1)The following example calculates 180 divided by pi and multiplies that by the arc sine of 1.
... | eval degrees=asin(1)*180/pi()asinh(X)
Description
This function computes the arc hyperbolic sine of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 0.881373587019543.
... | eval n=asinh(1)atan(X)
Description
This function computes the arc tangent of X, in the interval [-pi/2,+pi/2] radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 0.46.
... | eval n=atan(0.50)atan2(Y, X)
Description
This function computes the arc tangent of Y, X in the interval [-pi,+pi] radians.
Y is a value that represents the proportion of the y-coordinate. X is the value that represents the proportion of the x-coordinate.
To compute the value, the function takes into account the sign of both arguments to determine the quadrant.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 0.59.
... | eval n=atan2(0.50, 0.75)atanh(X)
Description
This function computes the arc hyperbolic tangent of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 0.549.
... | eval n=atanh(0.500)cos(X)
Description
This function computes the cosine of an angle of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic examples
This example returns 0.5403023058681398.
... | eval n=cos(-1)
The following example calculates the cosine of pi and returns -1.00000000000.
... | eval n=cos(pi())cosh(X)
Description
This function computes the hyperbolic cosine of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 1.5430806348152437.
... | eval n=cosh(1)hypot(X,Y)
Description
This function computes the hypotenuse of a right-angled triangle whose legs are X and Y.
The function returns the square root of the sum of the squares of X and Y, as described in the Pythagorean theorem.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
Creates a field called n and returns n=5, which is the hypotenuse of a triangle whose legs are 3 and 4.
... | eval n=hypot(3,4)sin(X)
Description
This function computes the sine of X.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic examples
This example returns 0.8414709848078965.
... | eval n=sin(1)... | eval n=sin(90 * pi()/180)sinh(X)
Description
This function computes the hyperbolic sine of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 1.1752011936438014.
... | eval n=sinh(1)tan(X)
Description
This function computes the tangent of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic examples
This example returns 1.5574077246549023
... | eval n=tan(1)This example returns -0.08871575677006045
... | eval n=tan(135)tanh(X)
Description
This function computes the hyperbolic tangent of X radians.
Usage
You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.
Basic example
This example returns 0.7615941559557649
... | eval n=tanh(1)