diff --git a/zeta_python/completed/28038.py b/zeta_python/completed/28038.py
new file mode 100644
index 0000000..d8f92d9
--- /dev/null
+++ b/zeta_python/completed/28038.py
@@ -0,0 +1,18 @@
+import sys
+from math import atan2, cos, sin, pi
+
+input = sys.stdin.readline
+
+
+def transpose(type: int, a: float, b: float) -> tuple[float]:
+    if type == 1:
+        m = atan2(b, a)
+        return round((a**2 + b**2) ** (1 / 2), 7), round(m if m >= 0 else 2 * pi + m, 7)
+    else:
+        return round(a * cos(b), 7), round(a * sin(b), 7)
+
+
+if __name__ == "__main__":
+    T = int(input())
+    # fmt: off
+    [print(*transpose(int(input()), *map(float, input().split()))) for _ in range(T)]