Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

Sine wave A has a positive-going zero crossing at 45°. Sine wave B ha

1.	Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?
A.	ave A leads wave B by 15°
B.	ave A lags wave B by 15°
C.	ave A leads wave B by 105°
D.	ave A lags wave B by 105°
Answer» B. ave A lags wave B by 15°