how do I find the value of the indicated function.
cot=1/3, find sin, tan. I know the answer is tan=3 how do I do the equation?

You don't have to do much. You only need to make a sketch.

Code:

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      /|
      / |
    /  |
    /  |
  /    |
  /    | 3
 /      |
/_______|
  1

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The angle is the one on the lower left side of the triangle.

tan x = 3 as your sketch tells you. Find the length of the hypotenuse using the two sides you know and you'll be able to find sin x and cos x.

Post what you get! :)