# L47: CABIBBO ANGLE — PRECISION

**Category:** library_prompt | **Kernel:** PHAT v1.27.5 | **Status:** PENDING

## Prompt

CABIBBO ANGLE — PRECISION
Recompute theta_12 to 6 significant figures using Hua polynomial. Show: arcsin(1/sqrt(20)) = 12.9210 degrees. Compute sub-leading correction from 2nd-order Hua term. Target: PDG theta_12 = 13.04 degrees. Quantify what correction is needed algebraically. #SuperGrokTOE #CabiboAngle #HuaCorrection