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.TH SDL_asin 3 "SDL 3.2.8" "Simple Directmedia Layer" "SDL3 FUNCTIONS"
.SH NAME
SDL_asin \- Compute the arc sine of
.BR x
\[char46]
.SH HEADER FILE
Defined in SDL3/SDL_stdinc\[char46]h

.SH SYNOPSIS
.nf
.B #include \(dqSDL3/SDL.h\(dq
.PP
.BI "double SDL_asin(double x);
.fi
.SH DESCRIPTION
The definition of
.BR y = asin(x)
is
.BR x = sin(y)
\[char46]

Domain:
.BR -1 <= x <= 1
Range:
.BR -Pi/2 <= y <= Pi/2
This function operates on double-precision floating point values, use

.BR SDL_asinf
 for single-precision floats\[char46]

This function may use a different approximation across different versions,
platforms and configurations\[char46] i\[char46]e, it can return a different value given
the same input on different machines or operating systems, or if SDL is
updated\[char46]

.SH FUNCTION PARAMETERS
.TP
.I x
floating point value\[char46]
.SH RETURN VALUE
Returns arc sine of
.BR x
, in radians\[char46]

.SH THREAD SAFETY
It is safe to call this function from any thread\[char46]

.SH AVAILABILITY
This function is available since SDL 3\[char46]2\[char46]0\[char46]

.SH SEE ALSO
.BR \(bu (3),
.BR SDL_asinf (3),
.BR \(bu (3),
.BR SDL_acos (3),
.BR \(bu (3),
.BR SDL_sin (3)