Question: 5. Let a, b E R, a 5. Let a,b e IR,a < b. Let function f: IR -+ IR be defined by 27r ,

5. Let a, b E R, a

5. Let a,b e IR,a < b. Let function f: IR -+ IR be defined by 27r , if GQ , if Q b Use the Integrability Reformulation to prove that f a cos (f does not exist. 2

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