A communications tower has wires anchoring it to the ground. Each wire is attached to the tower at a height 20 ft above the ground. The length y of the wire is modeled with the function y=20 cscθ , where θ is the measure of the angle formed by the wire and the ground. Find the length of wire needed to form an angle of 45°.
b. How can you rewrite the function so you can use a calculator?