Answers edited by İnci

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• How do you solve #abs(6-x)=9#?
  
• How do I prove that #sin^2x# + #tan^2xsin^2x# = #tan^2x# ?
  
• How do you graph #f(x) =-3abs(x+2)+2#?
  
• How do you simplify #tan^2x*csc^2x#?