Evaluate the tangent of a single-precision floating-point number (in radians).
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> Evaluate the [tangent][tangent] of a single-precision floating-point number (in radians).
The [tangent][tangent] is defined as
``bash`
npm install @stdlib/math-base-special-tanf
`javascript`
var tanf = require( '@stdlib/math-base-special-tanf' );
#### tanf( x )
Evaluates the [tangent][tangent] of a single-precision floating-point number (in radians).
`javascript
var v = tanf( 0.0 );
// returns ~0.0
v = tanf( -3.141592653589793/4.0 );
// returns ~-1.0
v = tanf( 3.141592653589793/4.0 );
// returns ~1.0
v = tanf( NaN );
// returns NaN
`
`javascript
var uniform = require( '@stdlib/random-array-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var PI = require( '@stdlib/constants-float32-pi' );
var tanf = require( '@stdlib/math-base-special-tanf' );
var opts = {
'dtype': 'float32'
};
var x = uniform( 100, -PI/2.0, PI/2.0, opts );
logEachMap( 'tanf(%0.4f) = %0.4f', x, tanf );
`
*
`c`
#include "stdlib/math/base/special/tanf.h"
#### stdlib_base_tanf( x )
Evaluates the [tangent][tangent] of a single-precision floating-point number (in radians).
`c`
float y = stdlib_base_tanf( -3.141592653589793f / 4.0f );
// returns ~-1.0f
The function accepts the following arguments:
- x: [in] float input value.
`c`
float stdlib_base_tanf( const float x );
`c
#include "stdlib/math/base/special/tanf.h"
#include
int main( void ) {
const float x[] = { 0.0f, 0.523f, 0.785f, 1.047f, 3.14f };
float y;
int i;
for ( i = 0; i < 5; i++ ) {
y = stdlib_base_tanf( x[ i ] );
printf( "tanf(%f) = %f\n", x[ i ], y );
}
}
`
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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---
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[tangent]: http://mathworld.wolfram.com/Tangent.html