Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency, and the phase relationship between the voltages

 

Frequency in Hz

Phase lead of N over M in radians

(1)

0.4

–π/4

(2)

2.5

–π/2

(3)

2.5

+π/2

(4)

2.5

–π/4

 

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