They are supplementary angles because their sum equals 180 degrees, and they are adjacent because they share a side.
A value that "lies outside" (is much smaller or larger than)
In this problem you use cosine because you know the hypotenuse and you want to know the adjacent side of the triangle. So in your calculator you would input cos(52). Then you would multiply that answer with the hypotenuse side. So your equation would be this: cos(52) x 13
Answer:
one hundred seventy eight point two five.