tand

Computes the tangent of an angle measured in degrees.

Usage

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

tand( x )

Evaluates the tangent of x (in degrees).

var v = tand( 0.0 );
// returns 0

v = tand( 60.0 );
// returns ~1.73

v = tand( 90.0 );
// returns Infinity

v = tand( NaN );
// returns NaN

Examples

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

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, -180.0, 180.0, opts );

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

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C APIs

Usage

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

stdlib_base_tand( x )

Evaluates the tangent of x (in degrees).

double out = stdlib_base_tand( 0.0 );
// returns 0.0

out = stdlib_base_tand( 60.0 );
// returns ~1.73

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_tand( const double x );

Examples

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

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

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

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See Also

• @stdlib/math/base/special/tan: evaluate the tangent of a number.
• @stdlib/math/base/special/cosd: compute the cosine of an angle measured in degrees.