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cotdf

README.md

cotdf

Compute the cotangent of a single-precision floating-point number (in degrees).

Usage

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

cotdf( x )

Evaluates the cotangent of a single-precision floating-point number (in degrees).

var v = cotdf( 0.0 );
// returns Infinity

v = cotdf( 60.0 );
// returns ~0.58

v = cotdf( 90.0 );
// returns 0.0

v = cotdf( NaN );
// returns NaN

Examples

var uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var cotdf = require( '@stdlib/math/base/special/cotdf' );

var opts = {
    'dtype': 'float32'
};
var x = uniform( 100, -180.0, 180.0, opts );

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

C APIs

Usage

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

stdlib_base_cotdf( x )

Evaluates the cotangent of a single-precision floating-point number (in degrees).

float out = stdlib_base_cotdf( 0.0f );
// returns Infinity

out = stdlib_base_cotdf( 60.0f );
// returns ~0.58f

The function accepts the following arguments:

  • x: [in] float input value.
float stdlib_base_cotdf( const float x );

Examples

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

int main( void ) {
    const float x[] = { 0.0f, 30.0f, 45.0f, 60.0f, 90.0f };

    float y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_cotdf( x[ i ] );
        printf( "cotdf(%f) = %f\n", x[ i ], y );
    }
}