Questions asked by Jordan Johnson

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• How do you simplify #(2)/(1/tan x-tan x)# ?
  
• If sin (x)= 3/8, where x is in quadrant 2, how would you find cos (x)?
  
• What is #tan(2A)# equivalent to?
  
• A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h= 1.6 meters, and the radius of the earth is R= 6.38 *10^6 meters. (a) How far is it to the horizon? (b) Express (a) in miles.
  
• A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h= 1.6 meters, and the radius of the earth is R= 6.38 *10^6 meters. (a) How far is it to the horizon? (b) Express (a) in miles.
  
• Let's say a cart was rolling down a ramp. If the mass of the cart increases, why would the gravitational potential energy remain the same? This was explained in my Physics class, but I still do not understand.
  
• Can anybody help with this problem?