diff --git a/lib/node_modules/@stdlib/math/base/special/secd/README.md b/lib/node_modules/@stdlib/math/base/special/secd/README.md
index 53e0b259e20f..ad7ed1d18b42 100644
--- a/lib/node_modules/@stdlib/math/base/special/secd/README.md
+++ b/lib/node_modules/@stdlib/math/base/special/secd/README.md
@@ -80,6 +80,94 @@ for ( i = 0; i < x.length; i++ ) {
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+## C APIs
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+### Usage
+
+```c
+#include "stdlib/math/base/special/secd.h"
+```
+
+#### stdlib_base_secd( x )
+
+Computes the [secant][secant] of `x` (in degrees).
+
+```c
+double out = stdlib_base_secd( 30.0 );
+// returns ~1.15
+
+out = stdlib_base_secd( 45.0 );
+// returns ~1.41
+```
+
+The function accepts the following arguments:
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+- **x**: `[in] double` input value.
+
+```c
+double stdlib_base_secd( const double x );
+```
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+### Examples
+
+```c
+#include "stdlib/math/base/special/secd.h"
+#include
+
+int main( void ) {
+ const double x[] = { 0.0, 30.0, 45.0, 60.0, 90.0 };
+
+ double y;
+ int i;
+ for ( i = 0; i < 5; i++ ) {
+ y = stdlib_base_secd( x[ i ] );
+ printf( "secd(%lf) = %lf\n", x[ i ], y );
+ }
+}
+```
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