diff --git a/lib/node_modules/@stdlib/math/base/special/sincos/README.md b/lib/node_modules/@stdlib/math/base/special/sincos/README.md
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+## C APIs
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+### Usage
+
+```c
+#include "stdlib/math/base/special/sincos.h"
+```
+
+#### stdlib_base_sincos( x, &sine, &cosine )
+
+Simultaneously computes the [sine][@stdlib/math/base/special/sin] and [cosine][@stdlib/math/base/special/cos] of a `number` (in radians).
+
+```c
+double cosine;
+double sine;
+
+stdlib_base_sincos( 4.0, &sine, &cosine );
+```
+
+The function accepts the following arguments:
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+- **x**: `[in] double` input value.
+- **sine**: `[out] double*` destination for the sine.
+- **cosine**: `[out] double*` destination for the cosine.
+
+```c
+void stdlib_base_sincos( const double x, double *sine, double *cosine );
+```
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+### Examples
+
+```c
+#include "stdlib/math/base/special/sincos.h"
+#include
+
+int main( void ) {
+ const double x[] = { 0.0, 1.57, 3.14, 6.28 };
+
+ double cosine;
+ double sine;
+ int i;
+ for ( i = 0; i < 4; i++ ) {
+ stdlib_base_sincos( x[ i ], &sine, &cosine );
+ printf( "x: %lf => sine: %lf, cosine: %lf\n", x[ i ], sine, cosine );
+ }
+}
+```
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