2.6 KiB
2.6 KiB
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ACOS function
Overview
ACOS is a function of the Math and Trigonometry category that calculates the inverse cosine (arccosine) of a number in the range [-1 to 1], returning an angle in the range [0 to $\pi$], expressed in radians.
Usage
Syntax
ACOS(number) => acos
Argument descriptions
- number (number, required). The number whose arccosine is to be calculated, in the range [-1 to 1].
Additional guidance
None.
Returned value
ACOS returns a number in radians in the range [0 to $\pi$] that is the angle whose cosine is the specified number.
Error conditions
- In common with many other IronCalc functions, ACOS propagates errors that are found in its argument.
- If no argument, or more than one argument, is supplied, then ACOS returns the
#ERROR!error. - If the value of the number argument is not (or cannot be converted to) a number, then ACOS returns the
#VALUE!error. - If the value of the number argument lies outside the range [-1 to 1], then ACOS returns the
#NUM!error. - For some argument values, ACOS may return a
#DIV/0!error.
Details
- The ACOS function utilizes the acos() method provided by the Rust Standard Library.
- The figure below illustrates the output of the ACOS function for angles
xin the range -1 to +1.
Examples
See some examples in IronCalc.
Links
- For more information about inverse trigonometric functions, visit Wikipedia's Inverse trigonometric functions page.
- See also IronCalc's SIN, COS and TAN functions.
- Visit Microsoft Excel's ACOS function page.
- Both Google Sheets and LibreOffice Calc provide versions of the ACOS function.