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Question
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?
Options:
A .  Wave A lags wave B by 105°.
B .  Wave A leads wave B by 15°.
C .  Wave A leads wave B by 105°.
D .  Wave A lags wave B by 15°.
Answer: Option B

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