Compute the arccosine of a double-precision floating-point number.
var acos = require( '@stdlib/math/base/special/acos' );Computes the arccosine of a double-precision floating-point number (in radians).
var v = acos( 1.0 );
// returns 0.0
v = acos( 0.707 ); // ~pi/4
// returns ~0.7855
v = acos( 0.866 ); // ~pi/6
// returns ~0.5236
v = acos( NaN );
// returns NaNThe domain of x is restricted to [-1,1]. If |x| > 1, the function returns NaN.
var v = acos( -3.14 );
// returns NaNvar uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var acos = require( '@stdlib/math/base/special/acos' );
var x = uniform( 100, -1.0, 1.0, {
'dtype': 'float64'
});
logEachMap( 'acos(%0.4f) = %0.4f', x, acos );#include "stdlib/math/base/special/acos.h"Computes the arccosine of a double-precision floating-point number (in radians).
double out = stdlib_base_acos( 1.0 );
// returns 0.0
out = stdlib_base_acos( 0.707 ); // ~pi/4
// returns ~0.7855The function accepts the following arguments:
- x:
[in] doubleinput value (in radians).
double stdlib_base_acos( const double x );#include "stdlib/math/base/special/acos.h"
#include <stdio.h>
int main( void ) {
const double x[] = { -1.0, -0.78, -0.56, -0.33, -0.11, 0.11, 0.33, 0.56, 0.78, 1.0 };
double v;
int i;
for ( i = 0; i < 10; i++ ) {
v = stdlib_base_acos( x[ i ] );
printf( "acos(%lf) = %lf\n", x[ i ], v );
}
}@stdlib/math/base/special/acosh: compute the hyperbolic arccosine of a double-precision floating-point number.@stdlib/math/base/special/asin: compute the arcsine of a double-precision floating-point number.@stdlib/math/base/special/atan: compute the arctangent of a double-precision floating-point number.