README.md

Covercosine

Compute the coversed cosine.

The coversed cosine is defined as

$$\mathop{\mathrm{covercos}}(\theta) = 1 + \sin \theta$$

Usage

var covercos = require( '@stdlib/math/base/special/covercos' );

covercos( x )

Computes the coversed cosine (in radians).

var v = covercos( 0.0 );
// returns 1.0

v = covercos( 3.141592653589793/2.0 );
// returns 2.0

v = covercos( -3.141592653589793/6.0 );
// returns 0.5

Examples

var uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var TWO_PI = require( '@stdlib/constants/float64/two-pi' );
var covercos = require( '@stdlib/math/base/special/covercos' );

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, 0.0, TWO_PI, opts );

logEachMap( 'covercos(%0.4f) = %0.4f', x, covercos );

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C APIs

Usage

#include "stdlib/math/base/special/covercos.h"

stdlib_base_covercos( x )

Computes the coversed cosine (in radians).

double out = stdlib_base_covercos( 0.0 );
// returns 1.0

out = stdlib_base_covercos( 3.141592653589793 / 2.0 );
// returns 2.0

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_covercos( const double x );

Examples

#include "stdlib/math/base/special/covercos.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { 0.0, 0.523, 0.785, 1.047, 3.14 };

    double y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_covercos( x[ i ] );
        printf( "covercos(%lf) = %lf\n", x[ i ], y );
    }
}

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See Also

• @stdlib/math/base/special/coversin: compute the coversed sine.
• @stdlib/math/base/special/vercos: compute the versed cosine.