Questions asked by Harlan G.

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• How many 3 digit counting numbers less than 800 have digits that are all even?
  
• Help solving the following equation? #log_7(x-2) + log_7(x+4)=2log_7 4# Please also check for extraneous solutions.
  
• Can you help evaluate this equation? #sin^2 (-420°)+ cot (270°) +csc(225°)#
  
• Can anyone evaluate #tan ((5pi)/6) - sin ((7pi)/4) + cot((4pi)/3)# ?