Can you help me with this trigonometry question?

You are designing a zip-line for a ropes course at a summer camp. A zip line is a cable to which people can attach their safety harnesses and slide down to the ground. You want to attach one end of the cable to a pole 50 feet high. The maximum safe angle of elevation for the zip-line is 25 degrees. Calculate the minimum length "x" (is the hypotenuse) of cable needed.