The two waves represented by `y_1=a sin (omegat)` and `y_2=b cos (omegat)` have a phase difference of

Options

A. (a) `0`
B. (b) `pi/2`
C. (c) `pi`
D. (d) `pi/4`

Answer

B

Explanation

`y_1=a sin omegat` and `y_2=b cos omega t=bsin (omegat+pi/2)`
So phase difference `varphi=pi//2`