Two waves are represented by the equations y₁=asin(ω+kx+0. 57) m and y₂=acos(ωt+kx) m where x is in meter and t in sec. The phase difference between them is
a) 0. 57 radian
b) 1. 0 radian
c) 1,25 radian
d) 1. 57 radian

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