a) [d/dx, x·d/dx] (b) [sin(x), cos(x)] (c) [x^2, Ĥ] , where Ĥ is a 1D Hamiltonian with V̂=V0 (constant) (d) [Â,B̂], where  = d^2/dx^2 + x and = 1
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2(3))
Calculate the following commutators:
(a) [d/dx, x·d/dx]
(b) [sin(x), cos(x)]
(c) [x^2, Ĥ] , where Ĥ is a 1D Hamiltonian with V̂=V0 (constant)
(d) [Â,B̂], where  = d^2/dx^2 + x and = 1
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