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Question

If A =open square brackets table row cell cos invisible function application alpha end cell cell sin invisible function application alpha end cell row cell negative sin invisible function application alpha end cell cell cos invisible function application alpha end cell end table close square brackets, then A A to the power of straight prime equals -

  1. I    
  2. A    
  3. straight A to the power of straight prime    
  4. 0    

The correct answer is: I

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