chore: replace separate sin/cos calls with sincos

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---

Author: anandkaranubc

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

@@ -40,8 +40,7 @@
         "@stdlib/complex/float64/ctor",
         "@stdlib/complex/float64/reim",
         "@stdlib/math/base/special/exp",
-        "@stdlib/math/base/special/cos",
-        "@stdlib/math/base/special/sin"
+        "@stdlib/math/base/special/sincos"
       ]
     },
     {
@@ -58,8 +57,7 @@
         "@stdlib/complex/float64/ctor",
         "@stdlib/complex/float64/reim",
         "@stdlib/math/base/special/exp",
-        "@stdlib/math/base/special/cos",
-        "@stdlib/math/base/special/sin"
+        "@stdlib/math/base/special/sincos"
       ]
     },
     {
@@ -76,8 +74,7 @@
         "@stdlib/complex/float64/ctor",
         "@stdlib/complex/float64/reim",
         "@stdlib/math/base/special/exp",
-        "@stdlib/math/base/special/cos",
-        "@stdlib/math/base/special/sin"
+        "@stdlib/math/base/special/sincos"
       ]
     }
   ]

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

@@ -20,8 +20,7 @@
 #include "stdlib/complex/float64/ctor.h"
 #include "stdlib/complex/float64/reim.h"
 #include "stdlib/math/base/special/exp.h"
-#include "stdlib/math/base/special/sin.h"
-#include "stdlib/math/base/special/cos.h"
+#include "stdlib/math/base/special/sincos.h"
 
 /**
 * Evaluates the cis function for a double-precision complex floating-point number.
@@ -68,9 +67,7 @@ stdlib_complex128_t stdlib_base_ccis( const stdlib_complex128_t z ) {
 
 	stdlib_complex128_reim( z, &re, &im );
 
-	// TODO: replace with stdlib/math/base/special/sincos
-	y = stdlib_base_sin( re );
-	x = stdlib_base_cos( re );
+	stdlib_base_sincos( re, &y, &x );
 	if( im != 0.0 ) {
 		e = stdlib_base_exp( -im );
 		y *= e;