refactoring: improved readability of sin approx function by splitting the bhaskara formula into multiple lines as well as using the already implemented functions for basic calculation functions

src/main/py/trigonometry.py

@@ -15,6 +15,12 @@ def rad2deg(radNumber):
     return (radNumber * 180) / math.pi
 
 def sin_approx_bhaskara(radNumber):
-    num = 16 * radNumber * (math.pi - radNumber)
-    denom = 5 * math.pow(math.pi, 2) - 4 * radNumber * (math.pi - radNumber)
-    return num/denom
+    num = multiply(16, radNumber)
+    num = multiply(num, subract(radNumber, math.pi))
+
+    denomFrag1 = multiply(5, math.pow(math.pi, 2))
+    denomFrag2 = subract(radNumber, math.pi)
+    denomFrag2 = multiply(denomFrag2, radNumber)
+    denomFrag2 = multiply(denomFrag2, 4)
+
+    return divide(num, subract(denomFrag2, denomFrag1))