From a55248a3b744b41e6b616b67fa25713fef3e1a08 Mon Sep 17 00:00:00 2001
From: AbhinavXT <abhinavpathaka17@gmail.com>
Date: Sat, 10 Jul 2021 14:42:53 +0530
Subject: [PATCH] Added RadianToDegree.js and RadianToDegree.test.js in Maths
 directory

---
 Maths/RadianToDegree.js           | 23 +++++++++++++++++++++++
 Maths/test/RadianToDegree.test.js | 21 +++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 Maths/RadianToDegree.js
 create mode 100644 Maths/test/RadianToDegree.test.js

diff --git a/Maths/RadianToDegree.js b/Maths/RadianToDegree.js
new file mode 100644
index 000000000..22429ea56
--- /dev/null
+++ b/Maths/RadianToDegree.js
@@ -0,0 +1,23 @@
+/*
+ * Radian : https://en.wikipedia.org/wiki/Radian
+ * Degree : https://en.wikipedia.org/wiki/Degree_(angle)
+ *
+ * Angle in Degree = ( Angle in Radian ) x ( 180 / pi )
+ *
+ * Example :
+ * Question : Convert pi / 2 degree to radian
+ * So, Angle in Radian = pi / 2
+ *
+ * Solution :
+ * Angle in Degree = ( pi / 2 ) x ( 180 / pi ) = 90
+ *
+ * So, pi / 2 radian is equal to 90 degree
+ */
+
+/**
+ * @param {number} radian
+ * @return {number}
+ */
+export const radianToDegree = (radian) => {
+  return radian * (180 / Math.PI)
+}
diff --git a/Maths/test/RadianToDegree.test.js b/Maths/test/RadianToDegree.test.js
new file mode 100644
index 000000000..507798fdf
--- /dev/null
+++ b/Maths/test/RadianToDegree.test.js
@@ -0,0 +1,21 @@
+import { radianToDegree } from '../RadianToDegree'
+
+test('should convert radian to degree:', () => {
+  const degreeEqual = radianToDegree(0)
+  expect(degreeEqual).toBe(0)
+})
+
+test('should convert radian to degree:', () => {
+  const degreeEqual = radianToDegree(Math.PI / 4)
+  expect(degreeEqual).toBe(45)
+})
+
+test('should convert radian to degree:', () => {
+  const degreeEqual = radianToDegree(Math.PI / 2)
+  expect(degreeEqual).toBe(90)
+})
+
+test('should convert radian to degree:', () => {
+  const degreeEqual = radianToDegree(Math.PI)
+  expect(degreeEqual).toBe(180)
+})