Sarah holds the end of her kite string 5 feet off the ground. The kite string makes a 43 degree angle of elevation with the horizontal and the kite is 105 ft. off the ground. How long is the kite string to the nearest tenth of a foot?
cos43=100/x
You should be using sine, not cosine, since the adjacent "side" is her distance from the kite and the opposite "side" is the height of the kite.