Question

Two sound waves are represented by y = a sin(ωt – kx) and y = a cos(ωt – kx). The phase difference between the waves in water is……… 

(A) (π/2) 

(B) (π/4) 

(C) π 

(D) (3π/4)

Answer 1

The correct option (A) (π/2)   

Explanation:

y = a sin (ωt – kx)

y = a cos (ωt – kx)

as sin (90 ± θ) = cos θ

hence phase difference is (π/2)