A point mass oscilllates along the x -axis according to the law x = x₀cos(ωt -π/4).if the acceleration of the particle is written as a = Acos(ωt+δ) then , (AIEEE 2007)
(a) A = x₀ , δ = -π/4
(b) A = x₀ω² , δ = π/4
(c) A = x₀ω² , δ = -π/4
(d ) A = x₀ω² , δ = 3π/4
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