Function conversion polar number to rectangular

DIRECTORY.md

@@ -166,6 +166,7 @@
   * [Octal To Binary](conversions/octal_to_binary.py)
   * [Octal To Decimal](conversions/octal_to_decimal.py)
   * [Octal To Hexadecimal](conversions/octal_to_hexadecimal.py)
+  * [Polar To Rectangular](conversions/polar_to_rectangular.py)
   * [Prefix Conversions](conversions/prefix_conversions.py)
   * [Prefix Conversions String](conversions/prefix_conversions_string.py)
   * [Pressure Conversions](conversions/pressure_conversions.py)

conversions/polar_to_rectangular.py

@@ -0,0 +1,36 @@
+import math
+
+
+def pol_to_rec(mod: float, mag: float):
+    ### https://en.wikipedia.org/wiki/Polar_coordinate_system
+    """
+    >>> pol_to_rec(5, 53)
+    (3.01, 3.99)
+    >>> pol_to_rec(10, 0)
+    (10.0, 0.0)
+    >>> pol_to_rec(0, 45)
+    (0.0, 0.0)
+    >>> pol_to_rec(5, 90)
+    (0.0, 5.0)
+    >>> pol_to_rec(5, 180)
+    (-5.0, 0.0)
+    >>> pol_to_rec(5, 270)
+    (-0.0, -5.0)
+    >>> pol_to_rec(5, 360)
+    (5.0, -0.0)
+    """
+
+    rad = math.radians(mag)
+
+    real = round((mod * math.cos(rad)), 2)
+    img = round(mod * math.sin(rad), 2)
+
+    rec = (real, img)
+
+    return rec
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()