What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?$?

What will be the phase angle between two alternating waves of equal fr

1.	What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?$?
A.	0¬¨‚àû
B.	45¬¨‚àû
C.	90¬¨‚àû
D.	180¬¨‚àû
Answer» D. 180¬¨‚àû