asin, asinf, asinl
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Calculates the arcsine.
double asin( double x ); float asin( float x ); // C++ only long double asin( long double x ); // C++ only float asinf ( float x ); long double asinl( long double x );
Parameters
x
Value whose arcsine is to be calculated.
The asin function returns the arcsine (the inverse sine function) of x in the range –π/2 to π/2 radians.
By default, if x is less than –1 or greater than 1, asin returns an indefinite.
| Input | SEH Exception | Matherr Exception |
|---|---|---|
| ± ∞ | INVALID | _DOMAIN |
± QNAN,IND | none | _DOMAIN |
| |x|>1 | INVALID | _DOMAIN |
Because C++ allows overloading, you can call overloads of asin with float and long double values. In a C program, asin always takes and returns a double.
| Routine | Required header |
|---|---|
asin, asinf, asinl | <math.h> |
For more information, see acos, acosf, acosl.
Floating-Point Support
acos, acosf, acosl
atan, atanf, atanl, atan2, atan2f, atan2l
cos, cosf, cosl, cosh, coshf, coshl
_matherr
sin, sinf, sinl, sinh, sinhf, sinhl
tan, tanf, tanl, tanh, tanhf, tanhl