diff --git a/test/test_trigonometricFunctions.c b/test/test_trigonometricFunctions.c
new file mode 100644
index 0000000..04c55df
--- /dev/null
+++ b/test/test_trigonometricFunctions.c
@@ -0,0 +1,17 @@
+#include "../src/trigonometricFunctions.h"
+#include "unity.h"
+#include "limits.h"
+
+void setUp(void) {
+    // set stuff up here
+}
+
+void tearDown(void) {
+    // clean stuff up here
+}
+void test_trigonometricFunctions_trigonometricFunctionsofsin(void) {
+    double expectedResult = 0.850903525 ;
+    double *result;
+    result = calculate_sin_double(45);
+    TEST_ASSERT_DOUBLE_WITHIN(0.1, expectedResult, *result);
+}