Answers edited by Parth S.

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• Is the slope of the #y# axis infinity?
  
• A triangle has corners A, B, and C located at #(2 ,7 )#, #(1 ,4 )#, and #(6 , 3 )#, respectively. What are the endpoints and length of the altitude going through corner C?
  
• What is the derivative of #y=cos^4(x^2)#?