Introduction to Quantum Mechanics · Problem 3.28

Formalism — David J. Griffiths

Physics — Quantum Mechanics · operator_functions

Problem

Let D^=d/dx\hat{D} = d/dx (the derivative operator). Find (a) (sin⁡D^)x5\left(\sin \hat{D}\right) x^5. (b) (11−D^/2)cos⁡(x)\left(\dfrac{1}{1 - \hat{D}/2}\right) \cos(x).

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