Angle determination in ECG can be calculated using trigonometric mathematical formula. Conventionally, they used to analyze the axis (angle) of P,QRS and T wave by the 4 quadrant method using the hex-axial reference system. But the medical staffs have to be very thorough with the formulation of hex-axial reference system before efficient interpretation of the axis of ECG waves. The angle (axis) can be easily calculated using trigonometric formula by scientific calculator which may help the junior medical staffs to interpret the axis quickly and easily.