BAEL-9683 Fix tutorials default-first build - ref# 156 (#5491)

* BAEL-9683 Fix tutorials default-first build - ref# 156

- Fix assertion error - loss of precision was happening because double was being divided by an integer

* BAEL-9683 Fix tutorials default-first build - ref# 156

- Fixed formatting

java-numbers/src/test/java/com/baeldung/maths/MathSinUnitTest.java

@@ -1,6 +1,7 @@
 package com.baeldung.maths;
 
-import static org.junit.Assert.assertTrue;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
 
 import org.junit.jupiter.api.Test;
 
@@ -11,10 +12,10 @@ public class MathSinUnitTest {
         double angleInDegrees = 30;
         double sinForDegrees = Math.sin(Math.toRadians(angleInDegrees)); // 0.5
 
-        double thirtyDegreesInRadians = 1/6 * Math.PI;
+        double thirtyDegreesInRadians = (double) 1 / 6 * Math.PI;
         double sinForRadians = Math.sin(thirtyDegreesInRadians); // 0.5
 
-        assertTrue(sinForDegrees == sinForRadians);
+        assertThat(sinForDegrees, is(sinForRadians));
     }
 
 }