From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/numeric%2Fcomplex%2Fccos.html | 52 --------------------------------- 1 file changed, 52 deletions(-) delete mode 100644 devdocs/c/numeric%2Fcomplex%2Fccos.html (limited to 'devdocs/c/numeric%2Fcomplex%2Fccos.html') diff --git a/devdocs/c/numeric%2Fcomplex%2Fccos.html b/devdocs/c/numeric%2Fcomplex%2Fccos.html deleted file mode 100644 index 99cece77..00000000 --- a/devdocs/c/numeric%2Fcomplex%2Fccos.html +++ /dev/null @@ -1,52 +0,0 @@ -

ccosf, ccos, ccosl

Defined in header <complex.h> 
float complex       ccosf( float complex z );
-		 (1) (since C99) 
double complex      ccos( double complex z );
-		 (2) (since C99) 
long double complex ccosl( long double complex z );
-		 (3) (since C99)
Defined in header <tgmath.h> 
#define cos( z )
-		 (4) (since C99)
-1-3) Computes the complex cosine of z.
-4) Type-generic macro: If z has type long double complex, ccosl is called. if z has type double complex, ccos is called, if z has type float complex, ccosf is called. If z is real or integer, then the macro invokes the corresponding real function (cosf, cos, cosl). If z is imaginary, then the macro invokes the corresponding real version of the function cosh, implementing the formula cos(iy) = cosh(y), and the return type is real.

Parameters

- -
z - complex argument

Return value

If no errors occur, the complex cosine of z is returned.

-

Errors and special cases are handled as if the operation is implemented by ccosh(I*z).

-

Notes

The cosine is an entire function on the complex plane, and has no branch cuts. Mathematical definition of the cosine is cos z =

-eiz+e-iz/2

Example

#include <stdio.h>
-#include <math.h>
-#include <complex.h>
- 
-int main(void)
-{
-    double complex z = ccos(1);  // behaves like real cosine along the real line
-    printf("cos(1+0i) = %f%+fi ( cos(1)=%f)\n", creal(z), cimag(z), cos(1));
- 
-    double complex z2 = ccos(I); // behaves like real cosh along the imaginary line
-    printf("cos(0+1i) = %f%+fi (cosh(1)=%f)\n", creal(z2), cimag(z2), cosh(1));
-}

Output:

-
cos(1+0i) = 0.540302-0.000000i ( cos(1)=0.540302)
-cos(0+1i) = 1.543081-0.000000i (cosh(1)=1.543081)

References

See also

- - - - -
-
(C99)(C99)(C99)
 computes the complex sine
(function)
-
(C99)(C99)(C99)
 computes the complex tangent
(function)
-
(C99)(C99)(C99)
 computes the complex arc cosine
(function)
-
(C99)(C99)
 computes cosine (\({\small\cos{x} }\)cos(x))
(function)
C++ documentation for cos
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/complex/ccos -

-
-- cgit v1.2.3