Calculate curved top line of letter T based on South at 270 deg

Co-authored-by: Dongdong Tian <seisman.info@gmail.com>

Author: yvonnefroehlich

pygmt/src/pygmtlogo.py

@@ -125,10 +125,10 @@ def _letter_m_coords():
 
     def _letter_t_coords():
         """Coordinates of the top curved horizontal line for letter T."""
-        outer_angles = np.deg2rad(np.arange(150, 210, 0.5))
+        outer_angles = np.deg2rad(np.arange(240, 300, 0.5))
         inner_angles = outer_angles[::-1]
-        t_x = np.concatenate([r2 * np.sin(outer_angles), r3 * np.sin(inner_angles)])
-        t_y = np.concatenate([r2 * np.cos(outer_angles), r3 * np.cos(inner_angles)])
+        t_x = np.concatenate([r2 * np.cos(outer_angles), r3 * np.cos(inner_angles)])
+        t_y = np.concatenate([r2 * np.sin(outer_angles), r3 * np.sin(inner_angles)])
         # Ensure the same X-coordinate for the right edge of T and the middle of M.
         mask = np.abs(t_x) <= (thick_gap + r4) / 2
         return {"x": t_x[mask], "y": t_y[mask]}