What this calculator does
Calculate arcsine, arccosine, or arctangent in degrees and radians.
How it works
The calculator evaluates θ = sin⁻¹(x), cos⁻¹(x), or tan⁻¹(x). Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
2-
?function=FunctionChoice · Required · Default: asin · Accepted values: asin, acos, atan
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?value=Input valueNumber · Required · Default: 0.5
Outputs
3-
degreesAngle in degreesNumber · Primary output
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radiansAngle in radiansNumber
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principalRangePrincipal rangeText
Inputs and results
The inputs are Function, Input value. Results include Angle in degrees, Angle in radians, Principal range.