A 65-year-old man with type 2 diabetes and stable angina presents for review. His current medications include metformin, atorvastatin, ramipril, and GTN spray PRN. His HbA1c is 58 mmol/mol (target <53 mmol/mol) and his blood pressure is 135/85 mmHg. He experiences angina symptoms once or twice a week on moderate exertion. What is the most appropriate next step in managing his angina?