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cos invisible function application left parenthesis alpha minus beta right parenthesis equals 1 text  and  end text cos invisible function application left parenthesis alpha plus beta right parenthesis equals 1 over c where alpha comma beta element of left square bracket negative pi comma pi right square bracket Pairs alpha comma beta which satisfy both the equations is/are

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  1. 0
  2. 1
  3. 2
  4. 4

    Answer:The correct answer is: 4

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