sincosd

Compute the sine and cosine of the input degree at the same time.

Interface Definition

C interface:

void sincosdf(float x, float* sinx, float* cosx);

void sincosd(double x, double* sinx, double* cosx);

Parameters

Parameter	Type	Description	Input/Output
x	For sincosdf, x is of single-precision floating-point type. For sincosd, x is of double-precision floating-point type.	Floating-point value of a degree angle.	Input
sinx	For sincosdf, x is of single-precision floating-point type. For sincosd, x is of double-precision floating-point type.	Output pointer sinx. If the pointer is null, an undefined behavior occurs, and the interface does not verify the output pointer.	Output
cosx	For sincosdf, x is of single-precision floating-point type. For sincosd, x is of double-precision floating-point type.	Output pointer cosx. If the pointer is null, an undefined behavior occurs, and the interface does not verify the output pointer.	Output

Parameter

Type

Description

Input/Output

For sincosdf, x is of single-precision floating-point type.
For sincosd, x is of double-precision floating-point type.

Floating-point value of a degree angle.

Input

sinx

For sincosdf, x is of single-precision floating-point type.
For sincosd, x is of double-precision floating-point type.

Output pointer sinx.

If the pointer is null, an undefined behavior occurs, and the interface does not verify the output pointer.

Output

cosx

For sincosdf, x is of single-precision floating-point type.
For sincosd, x is of double-precision floating-point type.

Output pointer cosx.

If the pointer is null, an undefined behavior occurs, and the interface does not verify the output pointer.

Output

Return Value

The sine sinx and cosine cosx of degree x are returned. sinx ∈ [-1, +1]; cosx ∈ [-1, +1]
If the input is +0, the sine is +0 and the cosine is +1.
If the input is -0, the sine is -0 and the cosine is +1.
If the input is ±∞, the sine and cosine are both NaN.
If the input is NaN, the sine and cosine are both NaN.

Dependency

#include "km.h"

Example

C interface:

    // typical usage
    double x1 = INFINITY, sinx1, cosx1;
    double x2 = 2.0, sinx2, cosx2;
    double x3 = -2.5, sinx3, cosx3;
    double x4 = NAN, sinx4, cosx4;
    double x5 = 0.0, sinx5, cosx5;
    sincosd(x1, &sinx1, &cosx1);
    sincosd(x2, &sinx2, &cosx2);
    sincosd(x3, &sinx3, &cosx3);
    sincosd(x4, &sinx4, &cosx4);
    sincosd(x5, &sinx5, &cosx5);
    // print result
    printf("/*\n");
    printf(" * sincosd(%.2f), sinval = %.6f cosval= %.6f\n", x1, sinx1, cosx1);
    printf(" * sincosd(%.2f), sinval = %.6f cosval= %.6f\n", x2, sinx2, cosx2);
    printf(" * sincosd(%.2f), sinval = %.6f cosval= %.6f\n", x3, sinx3, cosx3);
    printf(" * sincosd(%.2f), sinval = %.6f cosval= %.6f\n", x4, sinx4, cosx4);
    printf(" * sincosd(%.2f), sinval = %.6f cosval= %.6f\n", x5, sinx5, cosx5);
     /* 
     * sincosd(inf), sinval = nan cosval= nan
     * sincosd(2.00), sinval = 0.034899 cosval= 0.999391
     * sincosd(-2.50), sinval = -0.043619 cosval= 0.999048
     * sincosd(nan), sinval = nan cosval= nan
     * sincosd(0.00), sinval = 0.000000 cosval= 1.000000
     * */

Parent topic: Function Syntax