refactor: use stdlib APIs and adjust test tolerances

Ref: #2298 (comment)
Ref: https://github.com/stdlib-js/stdlib/actions/runs/9967632974/job/27541607216

Author: kgryte

lib/node_modules/@stdlib/math/base/special/ccis/manifest.json

@@ -39,7 +39,9 @@
         "@stdlib/math/base/napi/unary",
         "@stdlib/complex/float64/ctor",
         "@stdlib/complex/float64/reim",
-        "@stdlib/math/base/special/exp"
+        "@stdlib/math/base/special/exp",
+        "@stdlib/math/base/special/cos",
+        "@stdlib/math/base/special/sin"
       ]
     },
     {
@@ -55,7 +57,9 @@
       "dependencies": [
         "@stdlib/complex/float64/ctor",
         "@stdlib/complex/float64/reim",
-        "@stdlib/math/base/special/exp"
+        "@stdlib/math/base/special/exp",
+        "@stdlib/math/base/special/cos",
+        "@stdlib/math/base/special/sin"
       ]
     },
     {
@@ -71,7 +75,9 @@
       "dependencies": [
         "@stdlib/complex/float64/ctor",
         "@stdlib/complex/float64/reim",
-        "@stdlib/math/base/special/exp"
+        "@stdlib/math/base/special/exp",
+        "@stdlib/math/base/special/cos",
+        "@stdlib/math/base/special/sin"
       ]
     }
   ]

lib/node_modules/@stdlib/math/base/special/ccis/src/main.c

@@ -20,8 +20,8 @@
 #include "stdlib/complex/float64/ctor.h"
 #include "stdlib/complex/float64/reim.h"
 #include "stdlib/math/base/special/exp.h"
-#include <math.h>
-
+#include "stdlib/math/base/special/sin.h"
+#include "stdlib/math/base/special/cos.h"
 
 /**
 * Evaluates the cis function for a double-precision complex floating-point number.
@@ -68,8 +68,9 @@ stdlib_complex128_t stdlib_base_ccis( const stdlib_complex128_t z ) {
 
 	stdlib_complex128_reim( z, &re, &im );
 
-	y = sin( re ); //TODO: use stdlib function once available
-	x = cos( re ); //TODO: use stdlib function once available
+	// TODO: replace with stdlib/math/base/special/sincos
+	y = stdlib_base_sin( re );
+	x = stdlib_base_cos( re );
 	if( im != 0.0 ){
 		e = stdlib_base_exp( -im );
 		y *= e;

lib/node_modules/@stdlib/math/base/special/ccis/test/test.native.js

@@ -129,8 +129,9 @@ tape( 'the function computes cis(z) for complex z', opts, function test( t ) {
 		if ( real( q ) === cisre[ i ] ) {
 			t.strictEqual( real( q ), cisre[ i ], 'returns expected real component' );
 		} else {
+			// NOTE: the results may differ slightly from the reference and JavaScript implementations due to compiler optimizations which may be performed resulting in result divergence. For discussion, see https://github.com/stdlib-js/stdlib/pull/2298#discussion_r1624765205
 			delta = abs( real( q ) - cisre[ i ] );
-			tol = EPS * abs( cisre[ i ] );
+			tol = 1.05 * EPS * abs( cisre[ i ] );
 			t.ok( delta <= tol, 'within tolerance. z: '+re[i]+'+ '+im[i]+'i. real: '+real( q )+'. expected: '+cisre[i]+'. delta: '+delta+'. tol: '+tol+'.' );
 		}
 		if ( imag( q ) === cisim[ i ] ) {