Questions asked by St.Roller

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• Integration of some trignometric functions ?
  
• What is the last digit of N ?
  
• Evaluate this... ?
  
• Which relation is true for A ?
  
• What is the value of '#a#' for which #(log_a 7)/(log_6 7) = log_pi 36# holds good, is ?
  
• If #alpha = pi/13# then the value of #prod_(r=1)^6 cos(ralpha)# is equal to ?