diff --git a/java-numbers/src/test/java/com/baeldung/maths/MathSinUnitTest.java b/java-numbers/src/test/java/com/baeldung/maths/MathSinUnitTest.java
new file mode 100644
index 0000000000..111b2f4465
--- /dev/null
+++ b/java-numbers/src/test/java/com/baeldung/maths/MathSinUnitTest.java
@@ -0,0 +1,20 @@
+package com.baeldung.maths;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class MathSinUnitTest {
+
+    @Test
+    public void givenAnAngleInDegrees_whenUsingToRadians_thenResultIsInRadians() {
+        double angleInDegrees = 30;
+        double sinForDegrees = Math.sin(Math.toRadians(angleInDegrees)); // 0.5
+
+        double thirtyDegreesInRadians = 1/6 * Math.PI;
+        double sinForRadians = Math.sin(thirtyDegreesInRadians); // 0.5
+
+        assertTrue(sinForDegrees == sinForRadians);
+    }
+
+}