diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/README.md b/lib/node_modules/@stdlib/math/base/special/sincos/README.md
index 8e2dc81977a2..cea6faf3a09e 100644
--- a/lib/node_modules/@stdlib/math/base/special/sincos/README.md
+++ b/lib/node_modules/@stdlib/math/base/special/sincos/README.md
@@ -127,8 +127,8 @@ stdlib_base_sincos( 4.0, &sine, &cosine );
 
 The function accepts the following arguments:
 
--   **x**:      `[in] double` input value.
--   **sine**:   `[out] double*` destination for the sine.
+-   **x**: `[in] double` input value.
+-   **sine**: `[out] double*` destination for the sine.
 -   **cosine**: `[out] double*` destination for the cosine.
 
 ```c
diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/benchmark/c/native/benchmark.c b/lib/node_modules/@stdlib/math/base/special/sincos/benchmark/c/native/benchmark.c
index e4a168410792..d06a3ec598a9 100644
--- a/lib/node_modules/@stdlib/math/base/special/sincos/benchmark/c/native/benchmark.c
+++ b/lib/node_modules/@stdlib/math/base/special/sincos/benchmark/c/native/benchmark.c
@@ -101,13 +101,13 @@ static double benchmark( void ) {
 	for ( i = 0; i < ITERATIONS; i++ ) {
 		x = ( 20.0 * rand_double() ) - 10.0;
 		stdlib_base_sincos( x, &sine, &cosine );
-		if ( cosine != cosine || sine != sine) {
+		if ( cosine != cosine || sine != sine ) {
 			printf( "unexpected results\n" );
 			break;
 		}
 	}
 	elapsed = tic() - t;
-	if ( cosine != cosine || sine != sine) {
+	if ( cosine != cosine || sine != sine ) {
 		printf( "unexpected results\n" );
 	}
 	return elapsed;
diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/index.d.ts b/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/index.d.ts
index b53299967a1d..6e494a39bcb0 100644
--- a/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/index.d.ts
@@ -20,7 +20,7 @@
 
 /// <reference types="@stdlib/types"/>
 
-import { Collection } from '@stdlib/types/array';
+import { NumericArray } from '@stdlib/types/array';
 
 interface SinCos {
 	/**
@@ -67,7 +67,7 @@ interface SinCos {
 	* var bool = ( v === out );
 	* // returns true
 	*/
-	assign<T = unknown>( x: number, out: Collection<T>, stride: number, offset: number ): Collection<T | number>;
+	assign<T extends NumericArray>( x: number, out: T, stride: number, offset: number ): T;
 }
 
 /**
diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/test.ts b/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/test.ts
index 35c6e30836b5..e540f4e32a74 100644
--- a/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/test.ts
+++ b/lib/node_modules/@stdlib/math/base/special/sincos/docs/types/test.ts
@@ -49,7 +49,7 @@ import sincos = require( './index' );
 {
 	const out = [ 0.0, 0.0 ];
 
-	sincos.assign( 3.14e-319, out, 1, 0 ); // $ExpectType Collection<number>
+	sincos.assign( 3.14e-319, out, 1, 0 ); // $ExpectType number[]
 }
 
 // The compiler throws an error if the `assign` method is provided a first argument which is not a number...
diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/test/test.assign.js b/lib/node_modules/@stdlib/math/base/special/sincos/test/test.assign.js
index 0e0a101f5b7f..2e93303749e9 100644
--- a/lib/node_modules/@stdlib/math/base/special/sincos/test/test.assign.js
+++ b/lib/node_modules/@stdlib/math/base/special/sincos/test/test.assign.js
@@ -48,42 +48,6 @@ tape( 'main export is a function', function test( t ) {
 	t.end();
 });
 
-tape( 'the function computes the sine and cosine (for -256*pi < x < 0)', function test( t ) {
-	var cosine;
-	var delta;
-	var sine;
-	var tol;
-	var x;
-	var y;
-	var z;
-	var i;
-
-	z = [ 0.0, 0.0 ];
-	x = mediumNegative.x;
-	sine = mediumNegative.sine;
-	cosine = mediumNegative.cosine;
-
-	for ( i = 0; i < x.length; i++ ) {
-		y = sincos( x[i], z, 1, 0 );
-		t.equal( y, z, 'returns output array' );
-		if ( y[0] === sine[ i ] ) {
-			t.equal( y[0], sine[ i ], 'x: '+x[i]+'. Expected: '+sine[i] );
-		} else {
-			delta = abs( y[0] - sine[i] );
-			tol = EPS * abs( sine[i] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y[0]+'. Expected: '+sine[i]+'. tol: '+tol+'. delta: '+delta+'.' );
-		}
-		if ( y[1] === cosine[ i ] ) {
-			t.equal( y[1], cosine[ i ], 'x: '+x[i]+'. Expected: '+cosine[i] );
-		} else {
-			delta = abs( y[1] - cosine[i] );
-			tol = EPS * abs( cosine[i] );
-			t.ok( delta <= tol, 'within tolerance. x: '+x[i]+'. Value: '+y[1]+'. Expected: '+cosine[i]+'. tol: '+tol+'. delta: '+delta+'.' );
-		}
-	}
-	t.end();
-});
-
 tape( 'the function computes the sine and cosine (for -256*pi < x < 0)', function test( t ) {
 	var cosine;
 	var delta;
@@ -307,8 +271,8 @@ tape( 'the function returns `NaN` if provided a `NaN`', function test( t ) {
 	z = [ 0.0, 0.0 ];
 	v = sincos( NaN, z, 1, 0 );
 	t.equal( v, z, 'returns output array' );
-	t.equal( isnan( v[0] ), true, 'returns NaN' );
-	t.equal( isnan( v[1] ), true, 'returns NaN' );
+	t.equal( isnan( v[0] ), true, 'returns expected value' );
+	t.equal( isnan( v[1] ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -319,8 +283,8 @@ tape( 'the function returns `NaN` if provided `+infinity`', function test( t ) {
 	z = [ 0.0, 0.0 ];
 	v = sincos( PINF, z, 1, 0 );
 	t.equal( v, z, 'returns output array' );
-	t.equal( isnan( v[0] ), true, 'returns NaN' );
-	t.equal( isnan( v[1] ), true, 'returns NaN' );
+	t.equal( isnan( v[0] ), true, 'returns expected value' );
+	t.equal( isnan( v[1] ), true, 'returns expected value' );
 	t.end();
 });
 
@@ -331,8 +295,8 @@ tape( 'the function returns `NaN` if provided `-infinity`', function test( t ) {
 	z = [ 0.0, 0.0 ];
 	v = sincos( NINF, z, 1, 0 );
 	t.equal( v, z, 'returns output array' );
-	t.equal( isnan( v[0] ), true, 'returns NaN' );
-	t.equal( isnan( v[1] ), true, 'returns NaN' );
+	t.equal( isnan( v[0] ), true, 'returns expected value' );
+	t.equal( isnan( v[1] ), true, 'returns expected value' );
 	t.end();
 });
 
diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/test/test.main.js b/lib/node_modules/@stdlib/math/base/special/sincos/test/test.main.js
index 7fa5ecc0e2b4..87aa8619a837 100644
--- a/lib/node_modules/@stdlib/math/base/special/sincos/test/test.main.js
+++ b/lib/node_modules/@stdlib/math/base/special/sincos/test/test.main.js
@@ -247,21 +247,21 @@ tape( 'the function computes the sine and cosine (for x >= 2**60 (PI/2))', funct
 
 tape( 'the function returns `NaN` if provided a `NaN`', function test( t ) {
 	var v = sincos( NaN );
-	t.equal( isnan( v[0] ), true, 'returns NaN' );
-	t.equal( isnan( v[1] ), true, 'returns NaN' );
+	t.equal( isnan( v[0] ), true, 'returns expected value' );
+	t.equal( isnan( v[1] ), true, 'returns expected value' );
 	t.end();
 });
 
 tape( 'the function returns `NaN` if provided `+infinity`', function test( t ) {
 	var v = sincos( PINF );
-	t.equal( isnan( v[0] ), true, 'returns NaN' );
-	t.equal( isnan( v[1] ), true, 'returns NaN' );
+	t.equal( isnan( v[0] ), true, 'returns expected value' );
+	t.equal( isnan( v[1] ), true, 'returns expected value' );
 	t.end();
 });
 
 tape( 'the function returns `NaN` if provided `-infinity`', function test( t ) {
 	var v = sincos( NINF );
-	t.equal( isnan( v[0] ), true, 'returns NaN' );
-	t.equal( isnan( v[1] ), true, 'returns NaN' );
+	t.equal( isnan( v[0] ), true, 'returns expected value' );
+	t.equal( isnan( v[1] ), true, 'returns expected value' );
 	t.end();
 });