Add acosd and acosd's unittest.

src/Function1D.cpp

@@ -385,3 +385,21 @@ Matrix Aurora::acos(const Matrix& aMatrix)
     vdAcos(size, matrixData, resultData);
     return Matrix::New(resultData, aMatrix);
 }
+
+Matrix Aurora::acosd(const Matrix& aMatrix)
+{
+    if(aMatrix.isComplex() || aMatrix.isNull())
+    {
+        return Matrix();
+    }
+
+    size_t size = aMatrix.getDataSize();
+    double* matrixData = aMatrix.getData();
+    double* resultData = Aurora::malloc(size);
+    vdAcos(size, matrixData, resultData);
+    for(size_t i=0; i<size; ++i)
+    {
+        resultData[i] = resultData[i] * 180 / PI;
+    }
+    return Matrix::New(resultData, aMatrix);
+}