At t = 0, the displacement of a particle in S.H.M. is half its amplitude. Its initial phase is :
π6rad
π3rad
π2rad
2π3rad
A
2π3rad
B
π6rad
C
π3rad
D
π2rad
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Solution
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equation of S.H.M is y=Asin(ωt+ϕ) at t=0;y=A2 ⇒12=sinϕ ⇒ϕ=π6
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