diff --git a/src/math/Trigonometry.huff b/src/math/Trigonometry.huff
index 3aecf40..2ac9b96 100644
--- a/src/math/Trigonometry.huff
+++ b/src/math/Trigonometry.huff
@@ -94,8 +94,7 @@
 
     dup4                  // [angle, is_odd_quadrant, index, interp, angle]
     [QUADRANT_HIGH_MASK]  // [QUADRANT_HIGH_MASK, angle, is_odd_quadrant, index, interp, angle]
-    and                   // [QUADRANT_HIGH_MASK & angle, is_odd_quadrant, index, interp, angle]
-    iszero iszero         // [is_negative_quadrant, is_odd_quadrant, index, interp, angle]
+    and                   // [is_negative_quadrant, is_odd_quadrant, index, interp, angle]
 
     // Jump past updating the index if `is_odd_quadrant` is true
     dup2 is_odd_q jumpi   // [is_negative_quadrant, is_odd_quadrant, index, interp, angle]